| 释义 | 
             
                helical pair
                
            导程dǎo chéng 
 helical pitch; lead一双yī shuāng 
 a pair of, pair螺旋状的luó xuán zhuàng de 
 helical, helicoid, spiry对子duì zǐ 
 two pairs双双shuāng shuāng 
 in pairs序偶xù ǒu 
 ordered pair对duì 
 right; counter; face; pair括号对kuò hào duì 
 bracket pair平等的píng děng de 
 au pair双对子shuāng duì zǐ 
 two pairs一对yī duì 
 brace, pair, twain成对安装chéng duì ān zhuāng 
 paired mounting混双hún shuāng 
 mixed doubles; mixed pair一副yī fù 
 deck, pack, pair, set鸳鸯线对yuān yāng xiàn duì 
 crossed pair成对地chéng duì dì 
 in couples, in pairs成双地chéng shuāng dì 
 by twos, in pairs孤对电子gū duì diàn zǐ 
 lone pair electrons偶ǒu 
 even; by chance; idol; spouse; pair双shuāng 
 two; double; twin; both; dual; pair双驾马车shuāng jià mǎ chē 
 carriage and pair珠联璧合zhū lián bì hé 
 a perfect pair锥齿轮副zhuī chǐ lún fù 
 bevel gear pair龙凤双胞胎lóng fèng shuāng bāo tāi 
 a pigeon pair配对资料pèi duì zī liào 
 paired data; matched data
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