●take a (hard, severe, etc.) ˈknock (informal) to have an experience that makes sb/sth less confident or successful; to be harmed or damaged遭受（重大的）挫折；受到（沉重的）打击；受到（严重的）伤害或损害◆Confidence in the industry took a severe knock from the crisis.这个行业的信心受到这次危机的沉重打击。