cleft

裂缝, 隙口英释中释na natural crack in something, especially the surface of rocks or the Earth

1 cleft lip,n. 唇裂；兔唇

2 cleft palate,【医】腭裂

1 ...a narrow cleft in the rocks too small for humans to enter.....石块上一个对于人想钻进来说太小了的裂口。