penetration基本解释
n,渗透；突破；侵入；洞察力,同近
The floor is sealed to prevent water penetration..地板加了密封涂料防止渗水。
穿入；渗透英释nnthe act or process of making a way into or through sth
penetration rate,焊透率；穿进速率；进尺速度.短语
