有机合成--尤其句中的levels of怎么翻译啊 ? For efficient upgrading , we found that the chemical reaction should result in levels of about 3% for each of these impurities. 它的上文是“ As recrystallizations leads to high product losses, it is clearly advantageous to chemically generate material in the correct isomer as highly enriched as possible. ” 查看更多1个回答 . 1人已关注