改进题：The financing of the sale often involves bills of exchange and documentary credits.

译文：销售的融资通常涉及汇票或跟单信用证。

改进题：The financing of the sale often involves bills of exchange and documentary credits.

译文：销售的融资通常涉及汇票或跟单信用证。

改进的译文：商品买卖的贷款收付情况体现在汇票或跟单信用证中。