stock表，将零件键与供应商键相链接，跟踪每家供应商手头上的零件数量。
A STOCK table that links part keys and supplier keys and keeps track of the number of parts on hand at each supplier.
这里确实有足够的机器去生产我们需要的零件数量，当然这是至关重要的。
There is certainly enough machinery to produce the quantities we need, and that, of course, is vital.
他们被要求用紧密咬合在一起的乐高玩具积木，以最少的玩具零件数量，来搭建一个高大而又坚固的城堡。
They are asked to build a tall and sturdy tower using the smallest possible number of snap-together Lego bricks.
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