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Supply and demand issue is a main line or issue focus on economic theory history.
供求之争一直是经济理论史上的一条主线或争论焦点.
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鼻的动脉供给来源于两个动脉系统: 眼动脉和面动脉.
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The main driver of interior flows of oilseeds and grains is the supply available for export.
油籽和谷物在国内的流动主要是为了出口所需.
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They tapped the water main to supply the new workers'residential quarters.
他们接通了总水管,为新建工人住宅区供水.
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