1570s, "one who sails along coasts," agent noun from coast (v.) in its original sense "to go around the sides or border" of something. Applied to vessels for such sailing from 1680s. Tabletop drink stand (c. 1887), originally "round tray for a decanter," so called from a resemblance to a sled, or because it "coasted" around the perimeter of the table to each guest in turn after dinner.
双语例句
1. 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。
来自柯林斯例句
2. 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。
来自《权威词典》
3. Over the last few years Japan's socialists have seen their electoral popularity take a roller-coaster ride.
在过去的几年里，日本社会党在选民中的支持率忽高忽低。
来自柯林斯例句
4. 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。
来自柯林斯例句
5. She turned green when she came off the roller coaster.
