过去式::toppled
过去分词::toppled
现在分词::toppling
第三人称单数::topples
"The tower of the World Trade Center tumbled after the plane hit it"
A church steeple in flames, finally toppling to earth.
出自:E. BlundenI lost balance and toppled forward into a..shallow pool.
出自:A. CarterThe..bus caught fire after toppling down an embankment.
出自:New Musical Express