词根:tumble
adj.tumbling 歪斜状的
n.tumble 跌倒;翻斤斗;跌跤
tumbling 翻筋斗;摔跤
v.tumbling 跌倒;毁灭;被绊倒(tumble的ing形式)
vi.tumble 摔倒;倒塌;滚动;打滚;仓惶地行动
vt.tumble 使摔倒;使滚翻;弄乱
4.Lever-tumbler locks are often used in briefcases, safe-deposit boxes, and lockers.
杠杆式弹子锁通常用于公文包,保管箱,及储物柜。