这些波廷铜锌锡合金硬币的重量各不相同。

These potin coins are in varied weights.

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这两种元素只能生存不到一秒钟，然后就变成了常见的邻元素，比如碳、金、锡和锌。

The elements last for less than a second and join such familiar neighbors as carbon, gold, tin and zinc.

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锌、铅、锡和铝也都在去年中涨价不少。

Zinc, lead, tin and aluminium have also run up smartly over the past year.

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