Coliformin
类大肠杆菌素
🗣️ 情景例句
I can't put my finger on what exactly makes a written piece a classic.
我不知道什么使一篇著作成为经典。
Who is the auther of this essay?
谁是这论文的作者？
I'm afraid that he can't,Mr. Croft.Can't you wait till this afternoon?
恐怕不能，克罗夫特先生。您就不能等到今天下午吗？