请在单价上降低四美元，这样就可缩小我方与预期利润率的差距。
Could you please reduce your unit price by US$4 so that the gap with our profit margin would be narrowed?
大不列颠的铁路运输四通八达，单价格昂贵，价格提升快于大陆的大多数国家。大陆铁路不能直达英国。
Rail transport is readily available all over Great Britain but expensive: prices outpace most of those in the continental countries and Eurail is not valid.
该系统可以管理四种货物，每种的数量和单价在初始化时输入，在存储器中存储。
The system can manage four kinds of goods, the quantity and unit price of each in the initialization input, stored in memory.
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