那么还有很多事情要做，而所有这些关注带来的只有“探索水星很难”这个印象。

A long to-do list, then. Yet all this attention serves only to show how hard exploring Mercury is.

youdao

除，网页上还有这个链接，那么也会变成死链接。

In addition, page and this link, then it will become a dead link.

youdao

喔，我还有22块钱。但是还有这个星期的所有费用要付，如果我把星期六拿的钱全部用来付房租的话，那么下星期就一分钱也没有了。

Well, I've got twenty-two dollars, but there's everything to be paid for this week yet, and if I use all I get Saturday to pay this, there won't be any left for next week.

youdao

So we have 4 plus 5, but we're actually not done yet, because it's c n minus, so if we have minus, we actually have an extra electron in our molecule.

我们有四个加上五个，但是我们实际上还没做完，因为这是个负离子，所以如果我们有这个负号，那么我们的分子实际上还有一个额外的电子。

麻省理工公开课 - 化学原理课程节选