1. Make sure to seal the container tightly to keep the food airtight.
确保密封容器，使食物密封。

2. The windows in the house are airtight, keeping the cold air out.
房子的窗户是密封的，阻止冷气进入。

3. The airtight packaging of the product ensures its freshness.
产品的密封包装保证了其新鲜度。

4. It is important to keep the medicine in an airtight container to maintain its effectiveness.
将药物保存在密封容器中以保持其有效性是很重要的。

5. The scientist conducted the experiment in an airtight chamber to control the environment.
科学家在一个密封的室内进行实验以控制环境。

6. The airtight seal on the door prevented any noise from escaping the room.
门上的密封使得房间里的任何噪音都无法逃逸。