If you say that something such as a resource is precious, you mean that it is valuable and should not be wasted or used badly.
After four months in foreign parts, every hour at home was precious.
在国外待了四个月之后,在家的每一刻都是宝贵的。
A family break allows you to spend precious time together.
家庭度假使你们有机会共度宝贵时光。
Precious objects and materials are worth a lot of money because they are rare.
jewellery and precious objects belonging to her mother.
属于她母亲的首饰和珍贵物品。
If something is precious to you, you regard it as important and do not want to lose it.
Her family's support is particularly precious to Josie.
家人的支持对乔茜尤为珍贵。