在离开15年后，我回到了教学岗位，处理着从学生书包里冒出来的各种各样的“禁果”。
I was back teaching after an absence of 15 years, dealing with the various kinds of "forbidden fruit" that come out of book bags.
一只拿着票的手从里面伸出来，列车员拿着票离开了。
An arm stretches out from the bathroom and the conductor takes the proffered ticket.
研究者利用层析法——一种根据电荷或大小将混合物中的各种分子分离开来的方法，把各种不同的蛋白质从唾液链球菌的样品中分离出来。
Using chromatography, a method that divides the molecules in a mixture based on charge or size, they separated out individual proteins from samples of the microbe.
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