| 释义 |
| | | | NOUN | | | | | 1 | a structure like a tall railway with steep slopes at an amusement park , that you have fast rides on for fun （游乐场的）过山车，云霄飞车 | | | | 2 | a situation in which there are many big and sudden changes 急转突变的局势 | Share prices have been on a roller coaster these last few days. 最近几天来股票价格大起大落。 | | an emotional roller coaster 情绪时好时坏 | | | |