| 释义 | 
             
                useful aperture
                
            imperturbableadj. 沉着的;泰然自若的;镇静的imperturbabilityn. 沉着,冷静,缺乏热情
 有帮手的yǒu bāng shǒu de 
 useful有限孔径yǒu xiàn kǒng jìng 
 finite aperture中用zhōng yòng 
 useful荫栅yīn shān 
 aperture grille光圈guāng quān 
 aperture; diaphragm; halo孔径kǒng jìng 
 aperture; bore diameter成材chéng cái 
 become a useful person成器chéng qì 
 become a useful person益虫yì chóng 
 beneficial insect; useful insects穿孔卡片chuān kǒng kǎ piàn 
 aperture card孔kǒng 
 hole; opening; aperture; a surname孔径光栏kǒng jìng guāng lán 
 aperture diaphragm窍qiào 
 aperture; a key to sth.顶事dǐng shì 
 be useful, serve the purpose缝隙féng xì 
 gap; aperture; lacune; crack; crevice穴xué 
 aperture, delve, hole, opening, scoop, socket合成孔径雷达hé chéng kǒng jìng léi dá 
 synthetic aperture radar使用寿命shǐ yòng shòu mìng 
 service life; useful life; working life有用的yǒu yòng de 
 usable, useful, helpful, available, expedient, serviceable, subservient有益的yǒu yì de 
 profitable, beneficial, useful, helpful, instructive, rewarding, salutary, wholesome
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