Translation of "Unsure" in Chinese

She seemed somewhat unsure of herself.

她似乎对自己有点不确定。

He was unsure how he would get there, and when.

他不确定他怎么到哪里，以及什么时候。

Unsure of which suitor she wanted to marry, the princess vacillated, saying now one, now the other.

因为不知道想跟哪个追求者结婚，公主犹豫了，一会儿指定这个，一会儿指定那个。

- I don't know for sure.
- I'm not sure.
- I am not sure.
- I'm not certain.
- I'm unsure.

我不确定。