was able to/could¹
人文科學(xué)

        【問】 (1)Gauss was able to show by a theoretical analysis that the field arose within the solidearth...(北大《英語》(三),P.101)[原譯]高斯通過理論分析能夠證明場是在地球?qū)嶓w內(nèi)產(chǎn)生的……(教參)(2) After years of difficulty,Whittle was,however,able to build his firs......（本文共 2085 字）     [閱讀本文] >>