If your car runs out of petrol, you have used a tankful.
如果你的汽车烧光了汽油，可以说你用掉了一罐。
2
A whole tankful of gas dropped away because of the tiny leak.
由于这个小小的漏洞，整整一油箱的汽油都漏光了。
3
I don't mind buying an expensive car, but I do mind standing at a filling station watching the digital read-out adding noughts to my credit-card bill for a tankful of something I can't even see.