Primecost sum
[經] 預定款
?? 詞語組成解析
sum
[s?m]
n. 總數;算術;金額;概略，要點;
vt.& vi. 總計;總結，概括;歸納;
??? 情景例句
How do you feel about this?
你覺得呢？
There was a big crowd and we had difficulty getting a taxi.
外面有一大群人并我們有很困難招一輛出租車。
Lily was born ten minutes before me,so she says,I'm older than you! So I must open the present!
“我比你大！應該由我來拆禮物包！”