number
His mom makes (赚,zhuan) $89,600 every year.
What is 他妈妈每年挣八万九千六百块美金/美元。
Whenever Air China's tickets are on sale, I'll buy them.
中国国际航空公司(国航) 的票什么时候打折,我就什么时候买(他们的票)。
Credit cards are much more convenient than cash(现金).
What is 信用卡比现金方便多了 (很多)。
Aisle seats are much more convenient than window seats.
What is 靠走道的位子比靠窗户的位子方便多了(很多)。