sealing by fusing

例句：

1. 1. The door was sealed shut witha heavy padlock.
   门被厚重的锁紧紧封住。
2. 2. The package was sealedin a plastic bag for shipping.
   包裹用塑料袋密封，准备邮寄。
3. 3. Theseams of the dresswere sealed with glue.
   连衣裙的缝线被胶水密封。