B2 to keep something as it is, especially in order to prevent it from decaying or being damaged or destroyed保护,维护;保留;保养
to treat food in a particular way so that it can be kept for a long time without going bad对…进行保鲜处理;贮存
More examples
It's our duty to preserve the planet for future generations.
The Forestry Commission is responsible for preserving over 2 million acres of woodland.
The remains of the Roman fort are well preserved.
Every attempt is being made to ensure that these works of art are preserved for posterity.
He has a collection of prehistoric insects preserved in amber.
[ C or U ] a food made from fruit or vegetables boiled with sugar and water until it becomes a firm sauce蜜饯;果酱
[ S ] an activity that only one person or a particular type of person does or is responsible for(某人或群体的)专门活动
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