The stock sheet is diveded into two segments by the algorithm. Each segment consists of strips with the same length and the direction. Rectangular blanks of different sizes appear in one strip.
这种算法将板材分成两段，同一段中所有条带的长度和方向都相同，二段的条带方向相互平行或垂直，不同尺寸的毛坯可以在一根条带中出现。
The other thing to remember is that the Fed takes a "stock" approach to easing, which means it is the size of the balance sheet rather than the pace of purchases that matters.
另外，美联储采取“股法”手段来达到复苏的目的，这意味着关键的问题是资产负债的规模，而不是采购速度。
The stock of debt that banks and households still carry will take years to pay off. The hole in the balance-sheet must be sealed before the economy can regain its bounce.
银行和家庭的债务要花几年的时间才能偿完，资产负债表的大坑也要先填平了，经济才能重归反弹点。
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