- n. 不倒翁（玩具）；杂技演员；翻筋斗者；一杯的容量；滚筒；平底玻璃杯
[ 复数 tumblers ]tumbler [ 'tʌmblə ]
- a gymnast who performs rolls and somersaults and twists etc.
- a glass with a flat bottom but no handle or stem; originally had a round bottom
- a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
- pigeon that executes backward somersaults in flight or on the ground
同义词： roller tumbler pigeon