waterproof adj. 防水的，不透水的
例句：The corporation will come up with a new technique for waterproofing walls.
该公司将推出防止墙壁渗水的新技术。

watertight adj. 不漏水的，水密的
例句：As soon as the alarm went' the crew raced round shutting the watertight doors.
警报一响，船员们跑来跑去把船上的密封门关紧。

permeate vt. 弥漫，渗透，透过，充满 vi. 透入
例句：The smell of cooking permeates through the flat.
整套房间都弥漫着做菜的气味。

penetrate vt. 穿透，渗透，看穿，洞察 vi. 刺入，看穿，渗透，弥漫
例句：The sunshine could not penetrate where the trees were thickest.
阳光不能穿透树木最浓密的地方。

drip n. 水滴 v. （使）滴下
例句：Moonlight dripped through the leaves.
月光透过树叶洒下来。