Using materials on hand, try to do a little musical instrument.
利用手边的材料, 试做一件小乐器.
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The cost assigned to goods and materials on hand and not in production.
手头的货物和材料(不是生产中的)所指派的费用.
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But what kind of companies would have these materials on hand?
但是什么样的公司手上会有这些材料 呢 ?
电影对白