银河系中心是强引力下的一个独特的自然实验。
I think the reason why I am who I am today is because I went through those tough times when I was younger.
I'm not a master, I'm a slave.
年轻时,你以为世界是一个可以随心所欲生活的地方。但随着年龄增长,你意识到世界是一个你必须按照必须的方式生活的地方。
The future of forestry belongs to those who see trees as living systems, not just standing inventory.