让我们问他们：这些音乐作品是在什么时候(和怎么)制作的，它们描写的是什么，它们是怎么流传下来的和它们的社会背景是什么？

Let's ask them: when (and how) were these musical compositions made, what were they about, how did they circulate, what was their social context?

youdao

让我们不再询问人们他们是否做了备份，而要询问他们是否为恢复做了准备。

Let's stop asking people if they're doing backups, and start asking if they're doing restores.

youdao