Eng

Not certain...

無法斷定

Can't tell, Not certain, Not sure

(Am not, Am unable, Are not, Are unable, Is not, Is unable, Unable to, Was not, Was unable, Were not, Were unable, Conclude)

不見得

Not certain, Not definite, Not necessarily, Uncertain

(Didn't see)

不一定

Indefinite, Not certain, Not definite, Unsure

(Are all, Different, Not the same, Were all, Definitely, Probably)

不太確定

Not certain, Not quite

(Not very, Certain, Correct, Define, Defined, Defines, Defining, Definite, Definitely, Determine, Determined, Determines, Determining, Positive, Right, Sure, To define, To determine, True)