为自己加油

改进题：In addition to visible trade, which involves the importing and exporting of tangible goods,there is also invisible trade, which involves the exchange of services between nations.

译文：除了这种进出口商品的有形贸易以外，还有一种国与国之间进行交换服务的无形贸易。

改进的译文：除了这种进出口商品的有形贸易以外，还有一种国与国之间进行交换服务的无形贸易。