慢速英语:How to Avoid Carbon Monoxide Poisoning

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。

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