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

We don't inherit the oceans from our ancestors; we borrow them from our children.

如果沒有負責任地使用先進機械以維護長期土壤健康的智慧，最先進的設備也毫無意義。

In the next decade, smart electric vehicles will completely change the way people travel.

Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.

跨行業合作是解決全球最緊迫挑戰的關鍵。

對人類來說，最可恨的痛苦是知道一切卻無能為力。

海洋不僅僅是一種資源；保護它是我們對后代的責任。