胡：不是，那个没用。我想要白宫，或者再要那个五角大楼，里面的租客也一起要了。

HU: No, thats too low value. I want the White House. And maybe the Pentagon Building too, together with the current residents thrown in as my new tenants.

youdao

我不是那个意思。但是你知道没用的口罩对地球有害吗？

I'm not saying that. But do you know useless masks are harmful to the earth?

youdao

他没用多长时间就到了那块岩石，就根据他兄弟告诉他的树和其他记号找到了那个地方。

He was not long before he reached the rock, and found out the place, by the tree and other marks which his brother had given him.

youdao

Now, less than is just, if you haven't used it before, it's just the operator you'd expect, it's comparing two things and it's going to return either true or false depending on whether the first argument is false less than the second argument.

现在，小于这个符号是，如果你之前没用过它的话，它就是你期望的那个运算符，它会比较两个独享,然后基于第一个参数是不是,小于第二个参数,返回true或者。

麻省理工公开课 - 计算机科学及编程导论课程节选