one-to-one

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌone-to-ˈone adjective  1  TWObetween only two people 只在两人之间的，一对一的 tuition on a one-to-one basis 一对一的授课2  SAMEmatching each other exactly 完全对应的 a one-to-one correspondence between letters and sounds 字母与读音之间完全对应的关系 —one-to-one adverb I need to discuss it with him one-to-one. 我需要和他单独商量此事。

Examples from the Corpus

one-to-one• one-to-one counseling• There was a rally in the euro, but hopes of a recovery to a one-to-one parity did not materialise.• He preferred to keep his friends separate: a one-to-one person.• It will soon be as good or better than one-to-one teaching, say enthusiasts.

ˌone-to-ˈone adjectiveChineseSyllable  

Corpus only between people two

one-to-one
ˌone-to-ˈone adjective
1. between only two people:
    tuition on a one-to-one basis
2. matching each other exactly:
    a one-to-one correspondence between letters and sounds
—one-to-one adverb:
    I need to discuss it with him one-to-one.

one-to-oneBrE /ˌwʌn tə ˈwʌn/ 🔊NAmE /ˌwʌn tə ˈwʌn/ 🔊 (especially BrE) (NAmE usually ˌone-on-ˈone) adjective [usually before noun] between two people only 一对一的；仅限两人之间的◆a one-to-one meeting一对一的会见matching sth else in an exact way 一一对应的；完全对应的◆There is no one-to-one correspondence between sounds and letters. 发音与字母之间没有一对一的关系。🔊🔊▸ one-to-one adverb◆He teaches one-to-one. 他一对一地个别教学。🔊🔊