A pitfall trap can be any small container placed in the ground with the toplevel with the surrounding surface and filled with a preservative.
陷阱可以是任何放置在地面上的小容器，其顶部与周围的表面齐平，并装满防腐剂。
2
Despite nearly a decade of positive discrimination since apartheid was dismantled, few black sportsmen have reached the toplevel.
尽管种族隔离被取消后采取了近十年的平权举措，几乎没有黑人运动员达到过顶极。
《柯林斯英汉双解大词典》
3
After de-layering in this way, a company may be left with just a toplevel of senior managers, front-line managers and employees with direct contact with the public.