他在卡片上裹了一层塑料，然后又试了一次。

He wrapped one layer of the plastic around the card and tried again.

youdao

然后，在卡片上写下2到3个你可能会忘记的要点。

After that, write down 2 to 3 points that you may forget on a note card.

youdao

我把手印印在卡片上。

I sign the card with my handprint.

youdao

He has all the information he knows that has been reported on the various elements on file cards He even carried them around in his pocket and he would look at them from time to time and try to devise a scheme.

他将所有他知道的,已经研究出来的元素的信息放到文件卡片上,他将它们随身携带在口袋里,这样他就可以时不时地看它们了,并且试图设计出一个图表。

麻省理工公开课 - 固态化学导论课程节选

If you decide to opt in by a pass fail, I just need to sign your white study card or if you wanna decide before the 5th Monday, just grab the pink slip and I can sign that and you can turn that in at any point and I'm happy to chat during break today or after class if you have any questions or concerns.

如果你上我们的课程只是要一个分数，那么我只需要在你的白卡片上签个名就可以了,或者说，如果在第五周的周一前还没考虑好，把你的解聘书拿来，只要我签个字,任何时候你都开以离开我的教室,当然，如果你有任何问题和疑虑,我也很高心和大家做课下交流。

哈佛公开课 - 计算机科学课程节选