常見例句雙語例句In the paper we introduce the concepts of L-trivial, nil ordered semigroups and give every ordered semigroup is L-trivial if and only if the left divisibility relation is an order.特別地，我們還討論了序零半群，給出了這類半群與偏序半群上的左整除關系鏈的關系。 返回 nill