制造商们受需求增加的刺激而扩大生产品种，提高产品质量。
As demand has increased, so manufacturers have been encouraged to diversify and improve quality.
一降低成本，产品质量就会受到影响。
这与公司出售的家具的产品质量有关。
That was to do with the quality of the furniture products that the company was selling.
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