Negative clearance
[經] 豁免證明
?? 詞語組成解析
negative
['n?ɡ?t?v]
adj. 消極的，否認的;[數]負的;[心]反抗性的;無預期結果的;
n. 否定詞語;否定的觀點;消極性;[攝]底片;
vt. 否定;拒絕;
negat否認+ive形容詞后綴 → 否認的；n. 底片
??? 情景例句
Have a nice flight.
祝您一路順風。
There are forests here,and lumbering is important.
在這里有森林，木材業很重要。
If there had not been a hard layer of rock beneath the soil, they would have completed the job in a few hours.
如果不是因為土壤下面有一層堅硬的巖石，他們的營救工作僅用幾個小時就可以完成了。