On March 15th a fire started in the building housing reactor 4, possibly as a result of further hydrogen leaks.
在3月15日，容纳4号反应堆的厂房出现了火灾，很可能导致进一步的氢气泄漏。
Like deuterium, it is rare relative to helium-4, but, unlike hydrogen, helium doesn't form chemical compounds as abundant as water.
象氘一样，相对于氦- 4它是非常罕见的，但是不同于氢，氦不是来自化学混合物象水那样丰富。
If we want to talk about two hydrogen atoms, then we just need to double that, so that's going to be negative 2 6 2 4 kilojoules per mole that we're talking about in terms of a single hydrogen atom.
而要讨论两个氢原子，我们只需要把它乘以二，因此应该是负的，2624，千焦每摩尔，这就是单个的氢原子的情况。
The wide flammability range, 4% to 74% in air, and the small amount of energy required for ignition necessitate special handling to prevent the inadvertent mixing of hydrogen with air.
在空气中氢的易燃范围很宽，从4%到74%，而且点燃所需的能量很少，必须特别处理，以防止无意中把氢和空气混合在一起。
Our results measured by IR spectrum and gas chromatography show that the dissociation rate of hydrogen compound in natural reactant is anbot 10~4 less than deuterium compound.
由红外光谱和气相色谱法测得天然丰度原料的含氢化合物的解离速率较含氚化合物的解离速率小约10~4倍。
He explains that because the reactor 4 building was destroyed by a hydrogen explosion, TEPCO had to rebuild the structure.
他解释说，因为四号反应堆建筑被氢气爆炸所摧毁，东京电力公司不得不重建这一结构。
Compound 4 is a 3d structure built from polyanion, sulfate ion, water molecules through hydrogen bonding interactions.
化合物4是由多酸阴离子、硫酸根离子、水分子通过氢键胶合在一起，形成3d结构。
Fiber post can improve the strength of materials combined with polyurethane binder after 4 different surface treatments; the bonding strength of it is the greatest after hydrogen peroxide treatment.
结果证实经4种表面处理的纤维桩均能提高与聚氨酯黏结材料的黏结强度，过氧化氢处理后黏结强度最强。
Operation of JT-4/JT-1G hydrogenation catalysts on a hydrogen plant at Sinopec Jingmen Co. for hydrogenation of coker off-gas was described.
介绍了JT-4和JT-1G加氢催化剂在中国石化荆门分公司焦化干气制氢改造中的使用情况。
Synthesis, Characterization and Structure of Supramolecular Complexes of Hydrogen-bonding Connected with 4-acyl Pyrazolone and Imidazole, 2, 2 '-bipyridine and 4, 4' -bipyridine.
酰基吡唑啉酮衍生物与咪唑、2,2' -联吡啶、4,4 ' -联吡啶混配超分子配合物的合成、表征和晶体结构。
4-chloro-2-trifluoromethyl aniline was synthesized from 2-trifluoromethyl aniline, using hydrochloric acid-hydrogen peroxide as the chlorination agent and cupric chloride as the catalyst.
以邻三氟甲基苯胺为起始原料，二水氯化铜为催化剂，盐酸-双氧水为氯化剂，合成4 -氯- 2 -三氟甲基苯胺。
4-chloro-2-trifluoromethyl aniline was synthesized from 2-trifluoromethyl aniline, using hydrochloric acid-hydrogen peroxide as the chlorination agent and cupric chloride as the catalyst.
以邻三氟甲基苯胺为起始原料，二水氯化铜为催化剂，盐酸-双氧水为氯化剂，合成4 -氯- 2 -三氟甲基苯胺。
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