melted and cast 熔炼与铸锭
melted cast
融化的演员
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Since its chemical character is very active, Mg alloy is prone to oxidation and burning, which makes it impossible to be melted and cast in air.
但由于镁的化学性质活泼，非常容易氧化、燃烧，导致镁合金无法在大气条件下直接进行熔炼和浇注。
youdao
The cast iron was melted.
铸铁熔化了。
Bronze is harder than copper, more readily melted, and easier to cast.
青铜的熔点较低，较易铸造。
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