| 释义 | 
             
                Penganga R.
                
            gangrenen. 坏疽 vi. 生坏疽;腐败greengagen. 青梅pangaean. 盘古大陆;泛大陆panjandrumn. 首领,大人panegyricn. 赞美, 称颂, 颂词;颂扬的演讲或文章
 读、写、算dú  _ xiě  _ suàn 
 the three R's阴极射线管yīn jí shè xiàn guǎn 
 cathode-ray tube (CRT); cathode-ray lamp; C-R tube絮凝反应xù níng fǎn yīng 
 flocculoreaction; F. R.每分钟转数měi fèn zhōng zhuǎn shù 
 revolutions per minute (r/m)
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