单词roller coaster
n.: 过山车；〈比喻〉剧烈起伏(的事物)
网络: 翻滚过山车；云霄飞车；过山车的
（游乐场的）过山车，环滑车:
a track at a fairground that goes up and down very steep slopes and that people ride on in a small train for fun and excitement
不断变化的局势:
a situation that keeps changing very quickly
〈比喻〉剧烈起伏(的事物)
过山车,游乐场游戏的一种,又名“云霄飞车”
复数：roller coasters
What goes on inside is a mystery, no doubt. Roller coaster ride, I may never work it out.
内心会继续怎么变化是一个秘密，不要怀疑，过山车的刺激，我可能永远都不知道。
Take your dad to the amusement park. Gather your courage and brave a roller coaster with him to show your appreciation.
带父亲去主题公园。鼓起勇气，勇敢地和他一起坐过山车，借以表达你对他的感激。
For as long as he believes that he must plunge to the bottom after soaring to the top, his life will be a dizzy roller-coaster ride.
因为只要他相信他必须在沉到谷底后才能到达顶峰，他的生命就会像做过山车一样，晕头转向。
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。
While some experts called it a roller coaster kind of day, others were quick to put a calming tone to it.
当一些专家称之为反复不定的一天的时候，其他的人则用平静的口吻来描述她。
For me personally, it was a roller-coaster of a year.
就我个人而言，今年就像做过山车一样。
I worried that the roller coaster would be too scary for her, but she insisted.
我担心过山车对她来说太刺激，她却坚持要玩。
Like a roller coaster, life seems to race into dark valleys of uncertainty, and yet it seems only to inch toward peaks of hope.
人生好像过山车，全速驶向不明朗的幽暗之谷，但面对盼望的高山，却只能寸步而行。
The reason the Keepers give the metaphor of a roller coaster is to make sure you think of this in terms of fun.
保管者以过山车的比喻讲出来是为了让你觉得它很有趣。
Soon you find yourself on an exciting roller coaster ride, known as "dune bashing, " going up and down the dunes.
你很快会发现自己踏上云霄飞车般的刺激之旅，在沙丘间上上下下奔驰，人称这个活动为「飙沙」。