例句：
The floor is sealed to prevent water penetration.
地板加了密封涂料防止渗水。
The leak was eventually traced to a broken seal.
最后查出泄漏是由于密封处破裂所致。
Seal tightly then leave for four to five days to macerate.
密封之后再浸泡4至5天。
Make sure that your tiles are thoroughly grouted and sealed.
要确保这些瓷砖经过彻底灌浆并且密封好。
