a troop of scouts一队童子军
a troop of antelopes一群羚羊
a troop of kangaroos一群袋鼠
a troop of cavalry一个骑兵连
a troop of soldiers一队士兵
a troop of BaBoon一群狒狒
a troop of monkeys一群猴子
a troop of mushrooms一簇蘑菇
a troop of schoolchildren一群小学生