The used car advertisement is a big rip-off.
这个二手汽车广告是个大骗局。
Most college students know that buying books on campus can be a big rip off.
很多大学生都知道，在校园里买书就像被洗劫一场。
If there's a big chunk of the document you don't need, you can call extract to rip it out of the tree, then abandon it to be garbage collected while retaining control of the (smaller) tree.
如果文档中有一大块不是你需要，你也可以使用extract来将它弄出剖析树，再把它丢给垃圾收集器同时对(较小的那个)剖析树的控制。
If there's a big chunk of the document you don't need, you can call extract to rip it out of the tree, then abandon it to be garbage collected while retaining control of the (smaller) tree.
如果文档中有一大块不是你需要，你也可以使用extract来将它弄出剖析树，再把它丢给垃圾收集器同时对(较小的那个)剖析树的控制。
应用推荐