您要查找的是不是：
- oxygen trigger valve 供氧开关(活门)
- Water contains hydrogen and oxygen. 水含有氢和氧。
- I pulled the trigger and the gun went off. 我一扣扳机，枪就响了。
- He pulled the trigger of his rifle. 他扣响了他步枪的扳机。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- Have you turned off the water valve? 你关掉水阀了吗？
- Mars is too dry and poor in oxygen. 火星上面过于干燥，并且缺乏氧气。
- In group discussions, John is always quick on the trigger. 在小组讨论会上，约翰总是反应敏捷，争先发言。
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
- Fish take in oxygen through their gills. 鱼通过鳃摄取氧气。
- I pulled the trigger, but the gun hung fire and the deer escaped. 我扣动了扳机，可是枪打不响，那鹿也就逃走了。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
- The oxygen react vigorously with the impurity in the iron. 氧气与铁中的杂质发生剧烈的化学反应。
- Price increases trigger off demands for wage increases. 物价上涨引起了增加工资的要求。
- The oxygen workshop caught fire and set off a chain of explosions. 氧气车间着了火，引起了一连串的爆炸。
- He pulled the trigger and the bottle was shot to pieces. 他扣动扳机，瓶子当即被打得粉碎。
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳释放氧气。
- Water is composed of the elements hydrogen and oxygen. 水是由氢元素和氧元素组成的。
- There was a shortage of oxygen at the top of the mountain. 山顶上缺氧。
