问题: Please help me,thanks!
请帮助我理解以下的句子。The surface of the molten metal in the furnace is covered with dross,the mass of which is approximately 1t.This dross is removed by skimming:a scraper,handled by a small truck,sweeps the entire surface,collects all the dross towards the door sill and drops it into bins.
解答:
在熔炉中熔融金属的表面被熔渣覆盖，熔渣的质量大约是（1％？1t不知是什么）。熔渣通过撇渣去除：一把由一辆小车操纵的刮刀掠过整个表面，收集起所有的熔渣走到门口放进（废物）箱内。
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