Eng: Not sure

嘀咕

Be indecisive, Hesitant, Not sure, Undecided, Whisper

無法斷定

Can't tell, Not certain, Not sure

Aren't, Conclude, Isn't, Unable, Unable to

不太清楚

Not sure, Not very

Am clear, Are clear, Clearly, Is clear, Knew, Know, Knowing, Knows, To be, To be clear, Understand, Understanding, Understands, Understood, Was clear, Were clear, Without ambiguity