“我们到底还要失去多少标志性的物种，才能有所行动呢？” 他痛心地问。

"How many icons do we need to lose?" he asks.

youdao

他正在问本一些有关标志的问题。

He is asking Ben some questions about signs.

youdao

如果你想要把它们标志为私有的，不想让你的同学们，看到你问的问题，你当然也可以这样做。

If you would like to flag them as private, because you just don't want your classmates to see what you're asking, you can certainly do that.

youdao

If you would like to flag them as private, because you just don't want your classmates to see what you're asking, you can certainly do that.

如果你想要把它们标志为私有的，不想让你的同学们,看到你问的问题，你当然也可以这样做。

哈佛公开课 - 计算机科学课程节选