h 音标拼音: ['etʃ]
n . 字母
h 字母
h H n 1 :
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas ;
the simplest and lightest and most abundant element in the universe [
synonym : {
hydrogen }, {
H }, {
atomic number 1 }]
2 :
a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second [
synonym : {
henry }, {
H }]
3 :
the constant of proportionality relating the energy of a photon to its frequency ;
approximately 6 .
626 x 10 ^-
34 joule -
second [
synonym : {
Planck '
s constant }, {
h }]
4 :
the 8th letter of the Roman alphabet [
synonym : {
H }, {
h }]
5 : (
thermodynamics )
a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure ; "
enthalpy is the amount of energy in a system capable of doing mechanical work " [
synonym : {
heat content },
{
total heat }, {
enthalpy }, {
H }]
H \
H \ ([=
a ]
ch ),
the eighth letter of the English alphabet ,
is classed among the consonants ,
and is formed with the mouth organs in the same position as that of the succeeding vowel .
It is used with certain consonants to form digraphs representing sounds which are not found in the alphabet ,
as sh ,
th , [
th ],
as in shall ,
thing , [
th ]
ine (
for zh see [
sect ]
274 );
also ,
to modify the sounds of some other letters ,
as when placed after c and p ,
with the former of which it represents a compound sound like that of tsh ,
as in charm (
written also tch as in catch ),
with the latter ,
the sound of f ,
as in phase ,
phantom .
In some words ,
mostly derived or introduced from foreign languages ,
h following c and g indicates that those consonants have the hard sound before e ,
i ,
and y ,
as in chemistry ,
chiromancy ,
chyle ,
Ghent ,
Ghibelline ,
etc .;
in some others ,
ch has the sound of sh ,
as in chicane .
See Guide to Pronunciation , [
sect ][
sect ]
153 ,
179 ,
181 -
3 ,
237 -
8 .
[
1913 Webster ]
Note :
The name (
aitch )
is from the French ache ;
its form is from the Latin ,
and this from the Greek H ,
which was used as the sign of the spiritus asper (
rough breathing )
before it came to represent the long vowel ,
Gr . [
eta ].
The Greek H is from Ph [
oe ]
nician ,
the ultimate origin probably being Egyptian .
Etymologically H is most closely related to c ;
as in E .
horn ,
L .
cornu ,
Gr .
ke `
ras ;
E .
hele ,
v .
t .,
conceal ;
E .
hide ,
L .
cutis ,
Gr .
ky `
tos ;
E .
hundred ,
L .
centum ,
Gr .
"
e -
kat -
on ,
Skr . [.
c ]
ata .
[
1913 Webster ]
{
H piece } (
Mining ),
the part of a plunger pump which contains the valve .
[
1913 Webster ]
H \
H \ (
h [
aum ]). (
Mus .)
The seventh degree in the diatonic scale ,
being used by the Germans for B natural .
See {
B }.
[
1913 Webster ]
Ion \
I "
on \ ([
imac ]"[
o ^]
n ),
n . [
Gr . '
io `
n ,
neut ,
of '
iw `
n ,
p .
pr .
of '
ie `
nai to go .]
1 . (
Elec .
Chem .)
an atom or goup of atoms (
radical )
carrying an electrical charge .
It is contrasted with neutral atoms or molecules ,
and free radicals .
Certain compounds ,
such as sodium chloride ,
are composed of complementary ions in the solid (
crystalline )
as well as in solution .
Others ,
notably acids such as hydrogen chloride ,
may occur as neutral molecules in the pure liquid or gas forms ,
and ionize almost completely in dilute aqueous solutions .
In solutions (
as in water )
ions are frequently bound non -
covalently with the molecules of solvent ,
and in that case are said to be solvated .
According to the electrolytic dissociation theory ,
the molecules of electrolytes are divided into ions by water and other solvents .
An ion consists of one or more atoms and carries one unit charges of electricity ,
3 .
4 x 10 ^{-
10 }
electrostatic units ,
or a multiple of this .
Those which are positively electrified (
hydrogen and the metals )
are called {
cations };
negative ions (
hydroxyl and acidic atoms or groups )
are called {
anions }.
Note :
Thus ,
hydrochloric acid ({
HCl })
dissociates ,
in aqueous solution ,
into the hydrogen ion , {
H },
and the chlorine ion , {
Cl -};
ferric nitrate , {
Fe (
NO3 )
3 },
yields the ferric ion , {
Fe },
and nitrate ions , {
NO3 -}, {
NO3 -},
{
NO3 -}.
When a solution containing ions is made part of an electric circuit ,
the cations move toward the cathode ,
the anions toward the anode .
This movement is called migration ,
and the velocity of it differs for different kinds of ions .
If the electromotive force is sufficient ,
electrolysis ensues :
cations give up their charge at the cathode and separate in metallic form or decompose water ,
forming hydrogen and alkali ;
similarly ,
at the anode the element of the anion separates ,
or the metal of the anode is dissolved ,
or decomposition occurs .
Aluminum and chlorine are elements prepared predominantly by such electrolysis ,
and depends on dissolving compounds in a solvent where the element forms ions .
Electrolysis is also used in refining other metals ,
such as copper and silver .
Cf .
{
Anion }, {
Cation }.
[
Webster 1913 Suppl .]
2 .
One of the small electrified particles into which the molecules of a gas are broken up under the action of the electric current ,
of ultraviolet and certain other rays ,
and of high temperatures .
To the properties and behavior of ions the phenomena of the electric discharge through rarefied gases and many other important effects are ascribed .
At low pressures the negative ions appear to be electrons ;
the positive ions ,
atoms minus an electron .
At ordinary pressures each ion seems to include also a number of attached molecules .
Ions may be formed in a gas in various ways .
[
Webster 1913 Suppl .]
安装中文字典英文字典查询工具!
中文字典英文字典工具:
复制到剪贴板
英文字典中文字典相关资料:
为什么英文字母H一般读作 [h],读音却是 [eit͡ʃʰ]? - 知乎 The haitch pronunciation of h has spread in England, being used by approximately 24% of English people born since 1982, [7] and polls continue to show this pronunciation becoming more common among younger native speakers
英语的h是 [h],汉语的h是 [x],确定吗? - 知乎 下面是google搜索提供的发音指导,搜How to pronounce xxx就会出来,可以发现Huawei的h被丢掉。 看国外电视新闻、视频会发现99%的英语母语者读Huawei就是“娃为”,以至于有华为粉丝宣称这是华为官方钦定的标准发音。 当英语里h在中间时候也一样,例如Did he?
c++ - Разница между . h и . hpp - Stack Overflow на русском В чем разница между файлами с расширениями h и hpp в C++? Что лучше использовать?
很多人都把字母H读错了? - 知乎 很多人都把字母H读错了? 不知道为什么很多人都把H读成ei'qu(我没学过音标,所以用拼音来标记单词读音,标出来也只是一个大致读法。 下面的单词读音也是用拼音来标记的),也不知道… 显示全部 关注者 8 被浏览
什么是a站、b站、c站、d站、e站、f站、g站、h站、i站、j站、k站、l站、m站、n站…z站? - 知乎 A站 A站全称 “AcFun弹幕视频网”,成立于2007年6月,取意于Anime Comic Fun。 她是字母表的第一位,很巧的是,A站其实也是国内第一家弹幕视频网站,同时也算中国二次元文化的第一批发源地。 像现在大家都知道的“金坷垃、鬼畜全明星、我的滑板鞋、小苹果”等老牌鬼畜文化都是原创于A站。
英文字母 H 应该如何发音? - 知乎 我爸20年前学出来的读音是【A去】,而我顺着从小的语言习惯读作【A吃】。 我坚信中国式英语最终会演变成英语方言的一种,甚至每个省都独占一份英语方言。在中国式英语方言未形成标准的情况下,只要别人听得懂怎么读都是对的。
O que são os arquivos com extensão . cpp e . h? O h ou hpp conceitualmente são arquivos de cabeçalho e possuem códigos que o compilador precisa para compilar outras partes Em geral ali contém apenas as estruturadas de dados (classes por exemplo) com as assinaturas de métodos e funções, além de implementações que devem ser linearizadas ou gabaritadas
为什么中文日文都用 H 来表达色情? - 知乎 日语的 H 是来自「変態」(hentai)的首字母。 汉语中有 H 的说法吗? 不只是二次元中直接借用日语的 H? (评论中不少人指出,汉语的 H 可能来自「黄」(huang)的首字母,跟日语相同是巧合) 编辑于 2016-01-18 23:21 夜色祢 虚无主义者
*. h or *. hpp for your C++ headers class definitions [closed] I've always used a * h file for my class definitions, but after reading some boost library code, I realised they all use * hpp I've always had an aversion to that file extension, I think mainly be