roller coaster例句
I've been on an emotional roller-coaster since I've been here.
自从我到了这里，情绪就起伏不定。
The last few weeks have been a real
roller coaster.
过去的几个星期，形势真是变幻莫测。
It's great to go on the
roller coaster five times and not be sick.
坐了5次云霄飞车都没晕，真是太棒了。