seal cover

例句：

1. 1. The seal onthe package is broken, so it's not safe to eat.
   包装上的封条被撕开了，所以不能吃。
2. 2. The sealwas broken during transportation, which led tothe loss of the product.
   运输过程中封条被弄破了，导致产品丢失。
3. 3. Theseal on the jar is too tight,so we need to loosen it beforeopening.
   这个瓶子的封条太紧了，我们需要在打开之前松开它。