Slow efficiency at threshold is observed to be nearly constant over the wide range.

在广域范围内观测到的低效阈值近似为常数。

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However, outside the range of individual items, and sales began to slow down or unsalable.

然而，范围以外的个人物品和销售开始减缓或滞销。

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However, outside the range of individual items, and sales began to slow down or unsalable.

然而，范围以外的个人物品和销售开始减缓或滞销。

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