sill的解释n.基石(岩床,底面)sill的例句Solidifyingchieflyasaminorintr usion,especiallyasadikeorsill,beforereachingtheearth'ssurface.Usedofrocks.半深成的,浅成的在到达地球表面之前的主要作为小型岩石群固化的,尤其象岩脉或岩床的凝固用于指岩石Athinplankfastenedtothesideofaboatortothesillofaporttokeepouttheseaandthespray.挡水板,防浪板缚于船边或港基的薄木板。用来阻挡海水及其喷溅