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

數學是宇宙書寫其最深奧秘密的語言。

能源轉型不僅是挑戰，更是敢于創新者的機遇。

Memory is what we thought we’d forgotten; it’s also what we thought we’d remember.

We cannot always assure the future of our friends, but we have a better chance of assuring our future if we remember who our friends are.

始終保持你的刀鋒利，你的智慧更鋒利，你的精神最鋒利。