当我锻炼钢铁的时侯，我先把它在炉中烧红，然后用铁锤锤它，又忽然把它投入一桶冷水中。
When I am tempering a piece of steel, I first heat it, hammer it, and then suddenly plunge it into this bucket of cold water.
当我锻炼钢铁的时候，我先把它在炉中烧红，然后用铁锤锤它，又忽然把它投入一桶冷水中。
When I am tempering a piece of steel, I first beat it, hammer it, and then suddenly plunge it into this bucket of cold water.
当我锻炼钢铁的时候，我先把它在炉中烧红，然后用铁锤锤它，又忽然把它投入一桶冷水中。
When I am tempering a piece of steel, I first beat it, hammer it, and then suddenly plunge it into this bucket of cold water.
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