Hans flexed his powerful muscles.

汉斯放松了他强壮的肌肉。

He slowly flexed his muscles and tried to stand.

他缓慢地活动了一下肌肉，想站起来。

He flexed his stiff arm slowly.

他慢慢地弯曲他那僵硬的手臂。

Are the schedules being flexed?

日程表是否灵活安排？

Jackie Chan has flexed his vocal muscles for the Olympics.

成龙为迎接奥运会的到来“苦练”声带肌。