除了这些，旋度还有一个用处，如果你还记得，我们讨论平面的时候,当把线积分转换成二重积分的时候。

But another place where this comes up, if you remember what we did in the plane, curl also came up when we tried to convert line integrals into double integrals.

youdao

我不记得这些年我看过多少次这幅肖像画，如果你问我在大都会博物馆里哪幅画是我的最喜欢的，这幅在我心中地位更高。

I've seen this portrait I don't know how many times over the years. If I was asked what my favorite Met painting is, this one would rank high.

youdao

健康的牙齿和牙龈并不是天生的，如果你嫌刷牙很烦或是没有时间使用牙线，要记得笑容是取决于这些简单的牙科保健习惯的。

Having healthy teeth and gums isn't a given, though. If you think you're too tired to brush your teeth or too busy to floss, remember that your smile depends on these simple dental care habits.

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Even if you don't remember having seen them, even if that familiarity was generated with such quick exposures that you don't remember even having seen anything, you will get that familiarity effect.

如果你不记得曾经见到过它们，尽管对这些词汇，只是匆匆一瞥,你不记得见到过，熟悉度还是会发挥效应。

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