Xerox set about a process of reverse engineering. It pulled the machines apart and investigated the Japanese factories to find out how they could pull off such feats.
The archaeologist said most boulders with markings were too heavy to turn over to find out if they were decorated on the reverse side.
这位考古学家说，大多数带有标记的岩石都太重了，所以无法把它们翻转过来确定它们的背面是否有装饰。
3
Occasionally, you find yourself in a situation that’s the reverse of the section above. You have a file, but you don’t know what package it belongs to.