Ketonization
酮基化作用
??? 情景例句
He's the best pediatrician in Westchester.
他是全Westchester最好的小兒科醫(yī)師。
Do you have any questions at this point?
就這一點(diǎn)你們還有什么問(wèn)題嗎？
Textile business has become more and more difficult since the competition grew.
隨著競(jìng)爭(zhēng)的加劇，紡織品貿(mào)易越來(lái)越難做了。