Commercial discount
[經] 商業折扣
?? 詞語組成解析
discount
[d?s'ka?nt]
vt. 打折扣，減價出售;減息貸款;削價出售，打折;減價，減量;
vi. 折扣;貼現率;貼現;
n. 貼現;數目;（任何面值上的）扣除額;（考慮到故事、報告、報道等的夸張或偏見等）不全信;
dis 取消+ count數量 → 取消一些金錢的花費\r\n → (價格、債款等)折扣
??? 情景例句
Save that for the suckers.
鬼才信你那一套。
How much is a round-trip ticket to Beijing?
一張到北京的來回票要多少錢？
Excuse me for ringing you so late in the evening, but I've only just got home.
對不起，這么晚給你打電話，我剛到家。