可持续性不是一种选择;它是我们对后代的责任。
数学的美在于它既精确又富有创造性。
我认为能够轻松对待自己是很重要的。
If you wish to succeed, you should use perdistence as your good friend, experiece as your reference, prudence as your brother and hope as your sentry.
No matter what the future holds, I will continue to sing.