Halina searched the classifieds for dance classes .
海莲娜从分类广告中寻找舞蹈课程。
This also gives a posi - tive answer to Puczylowski ' s and Roszkowska ' s question like Halina But unfortunate - ly , the author is unable to build or find such a ring R that π _R and H_R contain no prime simple rings and () - rings , where π _R and H_R are , resp . , the smallest special class containing R and the homomorphic closure of { R } .
