交换、交易和互换的倾向普遍存在于所有人之中，而在其他动物种族中找不到。
The construction of green mines is not only an environmental requirement but also a reflection of corporate competitiveness.
The best thing to hold onto in life is each other.
当我21岁的时候我的期望降低到零。从那以后每件事情对我来说都是意外的礼物。
"The only thing that is truly valuable is time."
The stream of thought is a stream of survival.
"Innovation is the key to solving many of the world's problems, and it requires freedom to experiment and take risks."