1.deadly adj.致死的, 致命的
例句：She suffered from a deadly disease.
她患了绝症。
The shock was deadly to him.
这次打击对他是致命的。
2.decrease vi.减少,减小
例句：The traffic accidents in the city decreased last year.
该城市去年交通事故减少了。
3.inspect vt.检查；查看；审视
例句：The fire prevention branch inspects factories and all sorts of public buildings.
消防部门对工厂和各种公共建筑进行检查。
4.expel vt.驱逐, 赶走, 放逐,驱逐出境
例句：They expelled a foreign spy from their country.
他们把一个外国间谍驱逐出境。
排出，喷出
例句：The whale expelled water from his blowhole.
鲸鱼从鼻孔排出水。
1.How quickly this can happen depends on the length of time a person is breathing the gas and the amount of the gas he or she breathes in.
depend on依赖,依靠;取决于,随…而定
例句：All living things depend on the sun for their growth.
万物靠太阳生长。
2.The person may have trouble thinking clearly.
have trouble doing做某事有困难
例句："You see, Susie, when someone is very, very sad, they have trouble doing the little things like making dinner or other chores.
“你知道，苏西，当人很难过的时候，他们会连做饭或其他家务小事都没法做。
3. It will result in head pain, stomach problems and a feeling of tiredness after two to three hours.
result in导致,引起
例句：The flood resulted in a considerable reduction in production.
这次水灾造成相当大的减产。