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

I've learned that you can't control everything, but you can control how you react to it.

The teacher must believe in the potential of his students.

"El escritor es un buscador de verdades, y en su búsqueda encuentra la esencia de la humanidad."

反對森林砍伐的斗爭是為人類的未來而戰。

挑戰在于使不可能看起來真實，使真實看起來非凡。

How far you go in life depends on your being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and strong. Because someday in your life you will have been all of these.

科學中最重要的不是獲得新的事實，而是發現思考它們的新方法。