氧

水分子由两个氢原子和一个氧原子构成。

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

两个氢原子和一个氧原子结合组成一个水分子。

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

我再不做有氧健身操了——太累人了。

I don 't do aerobics any more ─ it 's too knackering .

氧的反应性很高。

Oxygen has high reactivity .

之前尝试过几次将鱼缸中的水过滤并充氧，但都没有成功。

Previous attempts at filtering and oxygenating aquarium water had failed .

散步不像有氧健身操那样需要交纳昂贵的费用来参加健身班或俱乐部。

Unlike aerobics , walking entails no expensive fees for classes or clubs .

越南战场上用于毁灭林区的“橙剂”，其成分是二氧杂芑。

Dioxin was the ingredient in Agent Orange , used to defoliate Vietnam .

我想参加有氧运动训练班来增强体质。

I 'd like to join an aerobics class to improve my fitness .

她教授游泳、救生术和水中有氧运动。

She teaches swimming , lifesaving and water aerobics .

走路，如果方法正确的话，也是一种有氧健身运动。

Walking , done in the right way , is a form of aerobic exercise

有氧运动加速心脏跳动，有助于消耗更多脂肪。

Aerobic exercise gets the heart pumping and helps you to burn up the fat .

那伙匪徒为打开金库用氧乙炔炬干了长达10个小时。

The gang worked for up to ten hours with acetylene torches to open the vault .

很多学生还通过慢跑、有氧体操、负重训练等方式来健身。

Many students are also keeping fit through jogging , aerobics , weight training , and the like .

钉子里的铁原子与空气中的氧原子结合后形成氧化铁分子，也就是锈。

Atoms of iron in the nail combine with atoms of oxygen from the air to form molecules of iron oxide , or rust .

氧化铁是铁和氧的化合物。

Iron oxide is a compound of iron and oxygen .

水分子是由两个氢原子和一个氧原子构成的。

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

水是含有氢元素和氧元素的化合物。

Water is a compound containing the elements hydrogen and oxygen .

水可分解为氢和氧。

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

水含有氢和氧。

Water contains hydrogen and oxygen .

水由氢和氧的原子构成。

Water is made up of atoms of hydrogen and oxygen .

氧是物质的基本元素之一。

Oxygen is one of the basic elements of substance .

事实上还不知道芳香族化合物的直接烷氧基化的方法。

Direct alkoxylation of aromatic compounds is virtually unknown .

氢和氧是水的主要成分。

Hydrogen and oxygen are the constituents of water .

氧会对金属产生化学作用。

Oxygen will exert a chemical action on metals .

过氧化苯甲酰、特别是偶氧二异丁腈不参加链移反应。

Benzoylperoxide , and especially azobisisobutyronitrile , do not take part in transfer reactions .

没有氧生物就无法生存。

No living things can live without oxygen .

例中没有甲氧基取代的笨，就应当排除任何嵌入反应的发生。

The lack of any methoxy-substituted benzenes would preclude any insertion process taking place .

血液在肺部与氧结合。

Blood is aerated in the lungs .

氧是生命所必不可少的。

Oxygen is vital to life .

使用过的其它试剂有亚钛离子、亚铁离子氧，抗坏血酸和乙四胺四乙酸混合物。

Among other reagents used have been titanousion , a mixture of ferrous ion , oxygen , ascorbic acid , and ethylenetetraaminetetraacetic acid .