箭头上的倒钩能防止猎物逃脱。

The arrow has a sharp ___barb to keep the prey from escaping.

她看似玩笑的话语里藏着伤人的刺。

Her seemingly joking words contained a sharp ___barb that hurt his feelings.

羽毛的细小倒钩帮助它保持形状。

The tiny ___barbs on the feather help it maintain its shape.