重点讲解：
1. by oneself
单独地，独自地；
eg. Own destiny should create by oneself.
自己的命运应由自己创造。
eg. Happiness enjoyed by oneself is a pleasure, so is sorrow tasted alone.
独享欢乐是一种愉快，独自忧伤也是一种愉快。
2. be meant to do sth.
理应发生；应该做某事；
eg. I meant to help him; unexpectedly I have brought him trouble.
我想帮助他，没想到反而给他添了麻烦。
eg. This speech is meant to be thrown away.
这段话要漫不经心地说出来。
3. think about
考虑；想想；
eg. I'd have to think about it.
我得好好考虑一下。
eg. Sit back for a minute and think about what you have done.
歇息一会，想想你做了些什么。