例句與造句

1. So far , mathematicians who study topology have obtained substantial achievements in important topological directions , such as generalized metric space , cardinal function , compactness , dimension theory , etc . but what is worth to paying attention to is that we often draw on one special type of topological space to think and solve problems , for example , the classical structures , sorgenfrey line k , michael line rq , niemytzki planetv , kxk , # q xp , etc . ; subtle and profound topological properties aredetailedly characterized by them
   而值得注意的是，在一般拓?fù)鋵W(xué)的研究歷史中，我們常常借助一類(lèi)特殊的空間來(lái)思考和解決問(wèn)題，如我們熟悉的經(jīng)典構(gòu)造： sorgenfrey直線(xiàn)k 、 michael直線(xiàn)r _ q 、 niemytzki平面n 、 k k 、 r _ q p等等，漂亮地刻畫(huà)了細(xì)微而深?yuàn)W的拓?fù)湫再|(zhì)。
2. It's difficult to find subtle and profound in a sentence. 用subtle and profound造句挺難的