地球每天污染资料:Oxygen is present in the bloodstream.

来源：百度文库 编辑：高校问答 时间：2024/05/03 06:46:33
这句话有错吗，如果有怎么改正

语法上，这句话没有错。氧气就出现在血液中，或存在血液中。

也转成The oxygen present in the bloodstream is decreasing/increasing.

blood carries oxygen是比较正确的说法。

就是要看你想表示什么。

你想表达什么意思啊？血液中有氧气？
那应该是
Blood carries oxygen.

错了
应该是is present at

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