短语和例子 an H-beam steel H形钢条。 an H-Post H形电杆。 drop one's h's 不发h音〔如伦敦方言中把 hat 读作'at 〕。 H hour 【军事】发起攻击的时间；特定军事行动开始的时刻。 = 【电学】 henry; 【化学】 hydrogen; 【物理学】磁场密度 (intensity of magnetic field), 地磁水平分量 (the horizontal component of terrestrial magnetism); 〔表示铅笔芯硬度的符号〕= hard(ness); 〔俚语〕heroin. H1 = 【化学】protium. H1＋ ＝ 【物理学】proton. H2 = 【化学】deuterium. H3 = 【化学】tritium.
the 8th letter of the Roman alphabet 同义词：H,
the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second 同义词：Planck''s constant,
H (named aitch , plural aitches;"H" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "aitch", op. cit.
例句与用法
1.
The quotient simply becomes arbitrarily large as h goes to 0 . 商，当h趋近0时，只是任意增大。
2.
The h conversion code provides a facility for printing out characters . H换算码为打印出字符提供方便。
3.
We will denote by h the perpendicular distance from p to the inclined face . 我们用h来表示从p点到斜面的垂直距离。
4.
In general the bearing will be "non-linear", the stiffness depending upon the value of h . 通常轴承是“非线性的”，它的刚度随h值而变。
5.
When mrs. h jennings talked of edward's affection, it cost her only a spasm in her throat . 当詹宁斯太太谈到爱德华的深情时，那番话只换得她喉咙里的一阵痉挛。
6.
Each plane passes through the n atom and one of the h atoms, and bisects the line connecting the other two h atoms . 每一个对称面都通过N原子和一个H原子，且平分其他二个H原子连线。
7.
If this output does not switch between h and l anymore a hard-ware reset is produced and the processor is initialized again . 如这个输出不再在高电平和低电平间作切换，硬件复位就会产生，并将处理器再次初始化。
8.
In practice the surfaces of interferometer plates cannot be worked perfectly plane, and in consequence the plate separation h always varies over the aperture . 实际上，干涉仪两板表面不可能加工得完全平，因而板的间隔h在孔径范围内总是改变的。
9.
Shortening overall heating period of 6000m3 h oxygen plant 制氧机的全面加温时间
10.
73 poem letter to a vampire poem c . h originally in english 73诗稿给吸血鬼的信
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