... local product; native product 土货 loop product; wreath product圈积 product by product reduction of tariff 产品对产品减税方式 ...
例句
例句
In this peper necessary and sufficient conditions for the semidirect products and wreath products of two scmigroup are given. 给出了两个半群的半直积和圈积为左群的充分必要条件以及半直积的结构。