With the exception of heavy copper, the best all-purpose material, in our opinion, is heavy, enameled cast iron.

除了厚实的铜锅之外，我们觉得最棒的万能材料是厚实的搪瓷铸铁。

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To get the full benefit out of cooking in copper, the metal must be 1/8 inch thick and the handle should be of heavy iron.

但若真想体验到用铜锅烹饪的妙处，那锅子至少要有1/8英寸那么厚，而且必须要有沉甸甸的铁制锅柄。

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FDA has not set a "tolerance level" for many of the drugs, pesticides and heavy metals found in beef, including copper and arsenic, which can promote growth and inhibit certain parasites.

食品药监局并未为许多自牛肉中发现的药物、农药和重金属元素设立“容忍标准”——包括铜元素和砷元素在内，这些添加物可以促进牛只生长及杀灭某种寄生虫。

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However, torque then becomes a problem, requiring huge generators with heavy copper windings that may scale out in the 3-4 MW range.

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The leads to the broken switch were just two heavy-gauge copper wires.

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