n. an acrobatic feat of rolling or turning end over end
v. fall down, as if collapsing
v. roll over and over, back and forth
v. throw together in a confused mass
词态变化
过去式:tumbled
现在分词:tumbling
过去分词:tumbled
第三人称单数:tumbles
复数形式:tumbles
常见例句
1
the part of a key that enters a lock and lifts the tumblers
2
a mouthful n a small fragment n a short theatrical performance that is part of a longer program n the part of a key that enters a lock and lifts the tumblers n the cutting part of a drill
3
s not liable to stumble or fall
4
stumble and nearly fall
5
collapse v sink below the surface v break down, literally or metaphorically v stumble and nearly fall
