然而到了13世纪，意大利已经成为欧洲丝绸生产和出口的领先者。
By the thirteenth century, however, Italy had become Europe's leader in silk production and export.
此外，美国也生产和出口许多商品。
Furthermore the US also produces and exports many commodities.
监管机构明年将会宣布几个低碳中心，出台优惠政策促进低碳生产和出口。
Regulators will announce several low carbon centers next year that will have preferential policies to promote low carbon manufacturing and exports.
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