Every car at a certain dealership is either a convertible,a

a Mercedes convertible奔弛敞蓬 It takes a car 12mins to go a certain distance at a uniform 翻译at a certain 急 a certain There is a car race near our town every yea. this is a car Is It a car? is there a car? _____ once every two years, whether it is a car, a bus or a That every vehicle,whether it is a car,a bus or a truck,must 求翻译简单英语句子：faiture at a certain period of time is acceptable. A lot of food is __________ appearing only at certain times