| 年久失修 | nian2 jiu3 shi1 xiu1 | worn down by years of non-repair |
| 一双手 | yi1 shuang1 shou3 | a pair of hands |
| 一双眼睛 | yi1 shuang1 yan3 jing5 | a pair of eyes |
| 一双筷子 | yi1 shuang1 kuai4 zi5 | a pair of chopsticks |
| 一双脚 | yi1 shuang1 jiao3 | a pair of feet |
| 一双鞋子 | yi1 shuang1 xie2 zi5 | a pair of shoes |
| 一对情侣 | yi1 dui4 qing2 lv3 | a pair of couples |
| 听力有障碍的 | ting1 li4 you3 zhang4 ai4 de5 | hearing-impaired |
| 成双对 | cheng2 shuang1 dui4 | to pair up |
| 无比绝望 | wu2 bi3 jue2 wang4 | to be filled with despair |
| 碱基互补配对 | jian3 ji1 hu4 bu3 pei4 dui4 | complementary base pairing e.g. adenine A 腺嘌呤 pairs with thymine T 胸腺嘧啶 in DNA |
| 碱基对 | jian3 ji1 dui4 | base pair (bp) consisting of two complementary nucleotides (adenine A 腺嘌呤 paired with thymine T 胸腺嘧啶 in DNA) |
| 碱基配对 | jian3 ji1 pei4 dui4 | base pairing (e.g. adenine A 腺嘌呤 pairs with thymine T 胸腺嘧啶 in DNA) |