not的釋義：
adv.(否定后面的詞或短語，或作否定的回答)不;(構成動詞be、do和have及情態(tài)動詞can或must等的否定形式，常縮略為n't)沒有
例句：
The problem is not primarily a financial one.
這個問題基本上不是財政問題。
This will not be possible in the changed economic climate.
這在經(jīng)濟氣候已經(jīng)改變的條件下是不可能的。
It was not a propitious time to start a new business.
那不是營業(yè)開張的吉時佳日。
It would be preferable to employ two people, not one.
雇請兩個人比雇請一個更好。
The results of the experiment are not statistically significant.
從統(tǒng)計學的觀點看，實驗結果意義不明顯。