roller coaster /ˈroʊlɚˌkoʊstɚ/ noun plural roller coasters
plural roller coasters
Learner's definition of ROLLER COASTER
[count]
1
: a ride at an amusement park which is like a small, open train with tracks that are high off the ground and that have sharp curves and steep hills(游乐场的)过山车,环滑车 2
: a situation or experience that involves sudden and extreme changes急转突变的情况(或体验)