- 一对一 yīduìyī one-to-oneone-to-one; one-on-one
- 天生一对 tiānshēngyīduì match made in heavena match made in heaven; a perfect couple
- 天生的一对 tiānshēngdeyīduì made for each othera couple who are perfectly matched and were made for each other
- 一对一斗牛 yíduìyīdòuniú one-on-one basketballone-on-one basketball game; streetball showdown
- 一一对应 yīyīduìyìng one-to-one correspondenceA relationship where each element in one group corresponds to exactly one element in another group
- 一对儿 yīduìr a paira pair; a couple
