n.跟斗；颠倒
v.翻筋斗
He turned a somersault. 他翻了个筋头。
A gymnast on the trampoline was turning somersaults. 有个体操运动员正在蹦床上做空翻.
The child somersaulted across the gymnasium. 那孩子翻著跟头从体育馆这头翻到那头。
