Cách sử dụng
The expression "seal in" means to trap or lock something in a particular condition or state. We usually use it when we want to keep things fresh. For example, when you store food in an airtight container, you're sealing it in to keep it fresh. Similarly, when you put on a coat to keep warm in cold weather, you're sealing in your body heat. It's important to seal things in to preserve them properly.