directional; orient; orientation; sense of orientation; predetermined orientation 短语和例子无线电定向 radio range orientation; 给 ... 定向 give an orientation to; 定向爆破 directional [directed] blasting; 定向选择 [生物学] orthoselection; directional selection; 定向学习 guided [purposeful] learning; 定向作用 [生物学] orientation; directional role u定向: u orientation; u-orientation摆置, 定向: orientation标定向: orientation line不定向: non-directional定位;定向: orient下载手机词典可随时随地查词查翻译