1. This bag seals in the freshness of the food.
这个袋子能锁住食物的新鲜度。

2. The lid seals in heat effectively.
这个盖子能有效锁住热量。

3. Cooking on low heat helps seal in flavor.
小火烹饪有助于锁住风味。

4. The packaging is designed to seal in moisture.
这种包装设计用于锁住水分。

A: Why do we use this container?
A：我们为什么要用这个容器？

B: It helps seal in the aroma of the food.
B：它可以锁住食物的香气。

1) 指密封保存，使内容物不外泄

2) 用于烹饪中锁住味道或水分

3) 用于包装技术保持新鲜度

1. to close or enclose something so that nothing escapes

e.g.The packaging seals in the flavor.
这种包装锁住了风味。

2. to retain heat, moisture, or aroma inside something

e.g.This method seals in the heat of the soup.
这种方法能锁住汤的热量。

phrasal verb

1. to enclose something so that air, liquid, or smell cannot escape

Synonym: enclose, trap, preserve