成群 放牧英释
The prisoners were herded together..犯人们被集合起来。
It was Tom’s duty to herd the cows..汤姆的职责是放牛。
a herd of,一群（牛、鹿等）
herd behavior,羊群行为；羊群效应；从众行为；群体恐慌行为
herd instinct,[心]群居本能，群体心理
