色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

采礦的未來在于智能化和可持續(xù)發(fā)展。

The old-fashioned dictator does not exist under scientific management. The man at the head of the business under scientific management is governed by rules and laws which have been developed through hundreds of experiments just as much as the workman is.

It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all.

Art is the highest form of hope.

A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable.

可持續(xù)發(fā)展需要平衡經(jīng)濟(jì)效益與環(huán)境保護(hù)。