农妇用连枷把谷粒从麦秆上打下来。
The farmer's wife beat the grains off the stalks with a wooden ___flail.
暴风雨中，树枝像鞭子一样猛烈摆动。
The branches ___flailed violently in the storm.
他在水中拼命挣扎，却无法靠近岸边。
He was ___flailing in the water, unable to reach the shore.
浙公网安备33010902004675号