他在地上打了个滚，挺身跳了起来。

He sprang to his feet after rolling on the ground.

她挺身坐在床上，穿着印花睡衣，看起来很迷人。

Sue was sitting up in bed, looking very fetching in a flowered bedjacket.

他们挺身抗帮，包揽词讼，以独特的方式承担了地方公共事务。

For example, they boldly engaged in an endless stream of lawsuits over the grain tax thereby assuming a distinctive role in public affairs.