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1·He threw a summersault on the bed.

他在床上翻了一个筋斗。

2·AB: I was 24 years old and at the top of my game when a freak summersault while downhill skiing paralyzed me.

阿曼达：我24岁时在生命的最巅峰，我速降滑雪时不慎摔倒，我瘫痪了。

筋斗

1·He threw a summersault on the bed.

他在床上翻了一个筋斗。