不一定

Function word; no; not; un-; negative prefix; used to form questions or emphasize a statement; sometimes used for rhythm.

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

To fix or set something firmly; to make definite or certain; to calm or stabilize; to decide; to book or subscribe; to congeal.