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.
双语例句
例： 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。
例： 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。