單一single;unitary
美向中國出口產品結構過于～。The mix of US exports to China lacks variety (or is far too limited).or:US exports to China tend to concentrate on just a few sectors.or:US exports to China are limited in product range./～關稅制single tariff system/～價格 single price;uniform price/～ 經濟 single-product economy/～稅率uniform tax rate /～稅制 uniform tax system/～文本的條約single-instrument treaty/～作物經濟single-crop economy/～種植monoculture;one-crop farming/～整體方案single integrated proposal |