值同等重量的金子;非常有价值
In the desert a bottle of water is often worth its weight in gold.
在沙漠中一瓶水往往非常贵重.
A reliable car is worth its weight in gold.
靠得住的汽车就是无价之宝.
This recipe book is worth its weight in gold-it tells you everything you need to know about cookery.
这本烹饪书非常有用&它告诉你有关烹饪所需知道的一切。
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