不见得
Not likely.

【发音】bù jiàn dé

【释义】不太可能，不一定。
            Not necessarily so; it is improbable that.

【例1】他今晚不见得会来。
           He's not likely to come tonight.

【例2】我看今年长裙不见得会过时。
           I will consider it unlikely (that) long skirt will go out this year.