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

Technological innovation is the core driving force for the high-quality development of the petroleum industry. We must increase R&D investment and break through key core technologies.

The most important political development of the last half century has been the spread of liberal democracy around the world.

寫得越多，越發(fā)現自己無知。

建筑師的任務是使不可見的東西變得可見。

Sin is a thing that writes itself across a man’s face. It cannot be concealed.

史記