hydrogen

Hydrogen and oxygen combine to form water .

氢与氧化合成水。

A molecule of water consists of two atoms of hydrogen and one atom of oxygen .

水分子由两个氢原子和一个氧原子构成。

Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water .

两个氢原子和一个氧原子结合组成一个水分子。

Atoms of hydrogen are fused to make helium .

氢原子可熔合成氦。

In May engineers found a leak in a hydrogen fuel line .

5月份工程师们在一条氢燃料管线上发现一条裂隙。

They 'd have a lot of hydrogen sulfide gas bound up in their cells .

他们的牢房里有大量的硫化氢气体。

A hydrogen leak forced NASA to ground the space shuttle .

氢气泄漏迫使美国国家航空航天局停止了航天飞机的发射。

Carbon , hydrogen and oxygen combine chemically to form carbohydrates and fats

碳、氢、氧化合形成碳水化合物和脂肪。

A methane molecule is composed of one carbon atom attached to four hydrogens .

甲烷分子由1个碳原子与4个氢原子构成。

Water is composed of hydrogen and oxygen .

水由氢气和氧气组成。

The professor had the glass tube filled with hydrogen .

教授将一个玻璃管充满氢气。

He is only 9 years old , but he knows that hydrogen and oxygen combine to form water .

他只有9岁，却知道氢与氧化合成水。

A molecule of water is formed by combining two atoms of hydrogen and one atom of oxygen .

水分子是由两个氢原子和一个氧原子构成的。

Water is a compound containing the elements hydrogen and oxygen .

水是含有氢元素和氧元素的化合物。

Water can be resolved [ decomposed ] into hydrogen and oxygen .

水可分解为氢和氧。

Water contains hydrogen and oxygen .

水含有氢和氧。

The first bubbles to escape from the liquid are a mixture of air and hydrogen .

从该液体中最先逸出的气泡是空气和氢的混合物。

Zinc displaces the hydrogen of dilute acids .

锌置换了稀酸中的氢。

Hydrogen is a one-valence element .

氢是一价的元素。

Qualitative analysis shows that water is made up of hydrogen and oxygen .

定性分析表明水是由氢氧结合而成的。

Water is made up of atoms of hydrogen and oxygen .

水由氢和氧的原子构成。

Hydrogen and oxygen are the constituents of water .

氢和氧是水的主要成分。

But why water and not , say , hydrogen peroxide or even ammonia ?

可是，为什么是水，而不是双氧水或是氨水呢？

Hydrogen combines chemically with oxygen to form water .

氢和氧化合成为水。

Acids produce positively charged hydrogen atoms when dissolved in water .

酸在水中溶解时可生成带正电荷的氢原子。

It has studied the action of hydrogen peroxide on nitrous acid .

它研究了过氧化氢对亚硝酸的作用。

The simplest covalently bonded molecule is formed from two hydrogen atoms .

最简单的共价键分子由两个氢原子组成。

Some balloons are filled with hydrogen , some with helium .

有的气球是用氢气充填的，有的则用氦气。

Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom .

碳原子的四个价电子都各与氢原子的一个价电子共用。

Catagensis is marked by a loss of hydrogen , and consequently by a decrease of the h / c ratio .

后生阶段以氢减少必然导致h／d比率降低为特征。