So you might ask well, why are we using this model if it clearly doesn't take into account quantum mechanics?

那么大家可能会问为什么我们要用这个,显然没有考虑量子力学的模型呢？

麻省理工公开课 - 化学原理课程节选

And other classes are completely closed book. You can't bring anything into it, even a calculator, so.

而有些课的考试是完全闭卷考试。考试时什么都不能带，甚至计算器都不行。

考试应该这么准备 - SpeakingMax英语口语达人

And then of course, there's the word sugar itself and then things like high fructose corn syrup, so there are a lot of ways that sugar gets put into foods and you wouldn't expect it to be there.

当然,还有糖本身这个词,还有像高果糖玉米糖浆这类东西,所以食品中含有很多形式的糖,而且你不知道它的存在

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选