Arithmetical series
[機(jī)] 等差級(jí)數(shù)
?? 詞語組成解析
a. 算術(shù)的, 算術(shù)上的\\n[機(jī)] 算術(shù)的
series
['s?riz]
n. 系列，連續(xù);串聯(lián);（廣播或電視上題材或角色相同的）系列節(jié)目;級(jí)數(shù);
ser(join)+ies(名詞后綴)→連續(xù)；系列；叢書
??? 情景例句
Then, how about 50% by L C and the rest by D P?
那么，50%用信用證支付，其余用付款交單支付，怎么樣？
How many feet are you going to use?
你要用幾英尺？
In this much-travelled world, there are still thousands of places which are inaccessible to tourists.
在這個(gè)旅游頻繁的世界上，仍有成千上萬個(gè)游人足跡未至的地方。