The breeze had long since dropped, and the dry grass stood stiff and straight as copper wires.

微风早经停息了；枯草支支直立，有如铜丝。

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There has also been a surprise drop in the fees charged by smelters and refiners to process dry feedstock, or copper concentrate as it is known, into anodes and eventually cathodes.

冶炼商和精炼商将干原料(即铜精矿)加工为阳极铜、以及最终加工为阴极铜收取的费用也令人意外地出现了下降。

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A week with dry compressed air or a copper brush cleaning machine back condenser more than once.

每周需用干燥的压缩空气或铜刷清理机台背部冷凝器一次以上。

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