There's nothing more exciting to see with your glasses on, while you look nice. You can take those off if you wish to, or you can try to just be splitting the light in the room until the TAs grab your glasses, either is fine.

虽然你们戴着眼镜很好看，但现没什么东西需要戴着看了，你们可以拿掉了,或者你们在助教收上来之前，试试看分开屋里的光。

麻省理工公开课 - 化学原理课程节选

py So you can either write 2 p x or 2 p y, whichever one you want is fine.

这是对的，你们可以把它写成2px或者，哪种都可以。

麻省理工公开课 - 化学原理课程节选

By the way, when we turn in concept sheets each week you'll have the option of turning them in either on Monday or on the Wednesday of that week, whenever you choose to do it is fine.

顺便说下,当我们每周收观点报告时,你们可以在当周周一,或者那周三上交,无论你选哪一天都是可以的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选