So when we write that out, we just write sigma 1 s squared, or we can break it up into its individual parts, there's no reason we can't do that as well.

当我们把这个写出来时，我们写sigma1s的平方，或者我们可以把它拆分成每个部分，我们没有理由不能这么做。

youdao

There is a saying that all work no play makes Jack a dull, it tells people they should find the amusement sometimes, people just can't work all the time, even the machine needs to take a break.

有一句话说，只有工作没有娱乐会让人变傻，这告诉人们应该时而找些乐子，不能一直工作，即使是机器也需要休息。

youdao

MacBook owners just can't seem to get a break, it seems.

ENGADGET: Screen flickering problem plagues MacBooks

But that happened, and then there were a series of apologies and theories about how to fix it, but mainly, there was the thought that the people who sell these sun rooms, like the one they sold to us, are going to sell like 10 jillion more of just bragging that elevators can fall from the sky and it still won't break.

NPR: Video Raises Questions About Bhutto Killing

It's easier said than done when you just can't break away.

NPR: The Trials and Triumphs of Candi Staton