He turned a somersault.是什么意思？

He turned a somersault.

他翻了个筋头.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

turned

v. （使）转动( turn的过去式和过去分词 )，旋转，（使）改变方向，（使）不适；

例句
With one accord they turned and walked back over the grass.
他们步调一致地转身走过草坪。

somersault

n. 翻筋斗，（意见、观点、态度等）180度的转变；vi. 翻筋斗；

例句
In the last 30 years, both sexes have performed a somersault in terms of expectations, roles and relationships.
最近 30 年里，男性和女性在个人期望、社会角色和人际关系方面都发生了 180 度的大转变。