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

The only constant is change, continuing change, inevitable change, that is the dominant factor in society today.

機(jī)器人技術(shù)的進(jìn)步，是為了讓人類生活更美好。

"The worst enemy of truth is not the lie—deliberate, contrived, and dishonest—but the myth—persistent, persuasive, and unrealistic."

海洋的健康直接影響地球和人類的健康。