seal boot

例句：

1. 1. He put on his seal boot and went out into the rain.
   他穿上他的密封靴，走出雨中。
2. 2. The worker used a seal boot to protect his feet from the cold.
   工人用密封靴来保护他的脚免受寒冷。
3. 3. The seal boots were designed for long hours of standing in wet conditions.
   密封靴是为长时间站立在潮湿条件下而设计的。