Bpay意为“支付”：pay 213600 yuan for the car:为这辆车支付了213600块钱固定搭配：pay $ for sth.spend（过去式spent）：花费，有固定词组：spend $ on sth./ (in) doing sth.例句：I spent 30 yuan on this book.I spent 4 days reading this book.(in可加可不加)spend表达的花费之意可以指花费金钱，也可以指花费时间、精力cost永远是物做主语，而上面两个词是人做主语。cost表示某物花费了某人多少多少钱，固定搭配：sth. cost sb. $例句：The ring cost him 100,000 dollars.The task could cost you your life.这项任务可能让你没命。
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