废旧镍镉电池中含有大量的有价值金属和物质。据估计，全球每年镍镉电池的生产量为60000吨，因此而消耗掉7000吨以上的镉。
It is estimated that more than 7000 tons of Cadmium is used to produce 60000 tons Ni-Cd batteries every year all over the world.
电子产品内含有价值的可回收金属。
Electronic products contain valuable metals that could be recovered.
这架飞机载有价值2.65亿英镑的黄金和钻石，当舱门突然打开时，贵重金属被送回地面。
The aircraft was carrying 265 million pounds worth of gold and diamonds, when the door flew open, sending the precious metal back to earth.
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