roller-coaster

基本解释

Beyond the challenges of culture shock and language, you must deal with the roller-coaster dollar as it rises and falls against other currencies.
除了文化冲击和语言的挑战，你还要处理像过山车一样上涨下跌的货币汇率。
I pushed through some dreary weather in Michigan and Ohio, climbed the roller-coaster foothills of the Appalachians and battled traffic and chewed up roads as I entered the city.
路上我熬过了密歇根州和俄亥俄州的阴沉天气、像坐过山车一样翻越了阿巴拉起亚山脉的山麓、忍受了进入市区后拥堵的交通和蜗牛般前行的无奈。
Taking a ride on the hormonal roller-coaster means lots of changes — and a lot of common worries — for both guys and girls.
来一次荷尔蒙的过山车意味着许多变化——我们都有一样的担忧——男孩和女孩。

Stock prices took a roller-coaster ride this week -- down one day,up the next.
She was meant to remember. She faced that possibility as she might the toy street from a high balcony, roller-coaster ride, feeding time among the beasts in a zoo, any death wish that can be consummated by some minimum gesture.
她生来就是为了回忆的，她面临着一种可能性,当她在一个高高的阳台看着玩具街时，当她坐过山车时，当她在动物园里喂野兽时，通过一个小小的手势。
耶鲁公开课 - 1945年后的美国小说课程节选
Each week,the show took them - and viewers - on an emotional and mind-bending roller coaster ride, through a dizzying loop of supernatural forces, armed conspirators and,of course,romance."

Through it all, she saw firsthand what an emotional roller-coaster the disease can be.
FORBES: F Cancer: Meet The 25-Year-Old Entrepreneur Who's Raised Over $1M For Early Detection, Prevention

A roller coaster is a small railway at an amusement park that goes up and down steep slopes fast that people ride on for pleasure or excitement.
If you say that someone or something is on a roller coaster, you mean that they go through many sudden or extreme changes in a short time.