n.倒鉤；刻薄的言語

Surgeons removed a foot-long barb from his heart. 外科醫(yī)生正從他的心臟移出一英尺長的倒鉤。

A fish hook has a barb to prevent the fish from escaping after being hooked. 魚鉤上都有一個倒鉤以防上了鉤的魚逃走.

And with that last barb, Harry's slowly unravelling grip on his temper gave way. 他一直聽到最后那句挖苦話，結(jié)果先前的忍耐終于失去控制了。