一部分
Written yī bù fen, said yí bù fen — 一 is yí before a fourth tone and yì before the others.
Meaning
- portion
- part of
- subset
Example sentence
你对了一部分。
You're partially correct.
Characters in 一部分
一 one plus 部分 a portion — some of it, where 大部分 is most of it.