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INTERMEDIATE LEVEL
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OXF3000N 
thiếu chính xác không chắc chắn 
uncertain
OXF3000N không thể xảy ra không chắc xảy ra unlikely
OXF3000N không chắc chắn khôn biết rõ ràng uncertain
OXF3000N không có thể xảy ra không chắc chắn không có thực unlikely
like: không chắc chắn → →
certain (that)...: She wasn't certain (that) he had seen her. ☊ certain ☊
I'm not sure—I can find out for definite if you like. ☊ definite ☊
Her future is uncertain. ☊ future ☊
I wasn't sure if I could handle such a powerful car. ☊ handle ☊
She went through an identity crisis in her teens (= was not sure of who she was or of her place in society). ☊ identity ☊
The future by its very nature is uncertain. ☊ nature ☊
One should never criticize if one is not sure of one's facts. ☊ one ☊
a period of consultation/mourning/uncertainty ☊ period ☊
The company's financial position is not certain. ☊ position ☊
She's a professor of something or other (= I'm not sure what) at Leeds. ☊ something ☊
For dessert there's a fruit pie of some sort (= you are not sure what kind). ☊ sort ☊
You don't sound very sure. ☊ sure ☊
sure how, whether, etc...: Ask me if you're not sure how to do it. ☊ sure ☊
I'm not sure whether I should tell you this. ☊ sure ☊
I'm not too sure if this is right. ☊ too ☊
They're both uncertain about what to do. ☊ uncertain ☊
I'm still uncertain of my feelings for him. ☊ uncertain ☊
Our future looks uncertain. ☊ uncertain ☊
I'm not sure that this is the most valuable use of my time. ☊ use ☊
wish sb/sth to do sth: He was not sure whether he wished her to stay or go. ☊ wish ☊