They recycle empty tins so as to use the metal.

他们回收空罐头盒以利用其金属。

youdao

Better still, the Recycle Bin should automatically delete files after some configurable period of time so you'd seldom have to empty it manually.

更好的方法是，回收站应该每过段时间就自动清空内部的文件，所以就会很少需要手工清空它。

youdao

If your hotel doesn't recycle, consider taking your empty bottles or other items home with you to recycle them there.

如果酒店没有循环使用的垃圾处理方法，请考虑把空瓶子或者其他物品带回家做循环垃圾处理。

youdao

You can also sift through your hard drive, delete temporary files and empty your recycle bin.

CNN: dotCOM Tools: Healthy PCs