重点讲解：
1. be known as 称为；叫做；
例句：The Qinghai-Xizang Plateau has long been known as the roof of the world.
青藏高原素有世界屋脊之称)O|X[+73M|rLQR。
2. be used to doing sth. 习惯于；
例句：She wasn't as proud and quick-tempered as her mother, but she was used to getting what she wanted.
她不像她母亲那样孤傲和脾气暴躁，但也是习惯了要什么有什么9J)i%S80|RKru-Wga+。
3. at night 在晚间；在夜里；
例句：Fireflies give off flashes of light when they fly at night.
萤火虫夜间飞行时发出闪光]XF-5=SmU^SO;#TzfOja。
4. go through 经历，经受；
例句：I believe that all that you go through here must have some value, therefore there must be some reason.
我相信的是我们现在经历的一切一定有价值，因此必有某些道理，也必然预示着有些事情“将要发生”|M][p17JewgJ0l。