Morpholinyl
(2-或3-)吗啉基
🗣️ 情景例句
You have been working on this for some time, Richard.
你从事这工作已有一段时间了， Richard。
A man may lead a horse to the water, but he cannot make him drink.
牵马到河易，强马饮水难。
Politicians agree, in principle,
政治家在原则上同意了， 因此，