seal lac

例句：

1. 1. The seal lac was applied to the wooden door to prevent it from being damaged by water.
   在木制门上涂抹了密封胶以防止它被水损坏。
2. 2. The seal lac on the window made it difficult for insects to enter.
   窗户上的密封胶使昆虫难以进入。
3. 3. The seal lac on the seam of the carpet prevented it from coming undone during transportation.
   地毯接缝处的密封胶在运输过程中防止了其脱落。