请求高手看看翻译对不对? i prefer to mix 2-methyl-5-ethylpyridine with an inert gas..... i needn’t, however, mix the vapors with an inert gas ;for the 2-methyl-5-ethylpyridine may be mixed with air ,or it need not be mixed with anything. 我更喜欢掺混入某种惰性气体……,然而我没有必要掺混惰性气体,这是由于其中可能混有空气,换句话说,该蒸气无需掺混任何气体。 or 也就是说,换言之 eg. she studies biochemistry, or the science of life. 她学生物化学,也就是生命科学。查看更多