原句是：a sale takes place at one of two points in time请问at one of two points in time在这里是什么意思

原句是：a sale takes place at one of two points in time请问at one of two points in time在这里是什么意思 a PLA soldier什么意思 make a sale 造句 have a good sale have a bake sale have a yard sale enjoy a ready sale make a sale 1:The sale usually takes place outside the house,with the audience__on benches,chairs or boxes.A:having seated B:seating C:seated D:having been seated The sale usually takes place outside the house,with the audience___on benches,chairs or boxes.A:having seatedB:seatingC:seatedD:having been seated sale 翻译：“have a bake sale. He is a sale-assistant. have a great sale 是什么意思 in a sale 和on sale 的具体区别 at a great sale 还是 at great sale? at a great sale 还是at great sale at a low price意思相同的是什么?A.at sale B.in sale C.on sale D.for sale