mpg means miles per gallon. It is a way of talking about how far a car can go on a set amount of petrol.

mpg mpg means miles per gallon意思是每加侖能跑幾英里. It它 is a way of talking about how far a car can go on a set amount of petrol是一種說法，用來描述一輛車加一定量的汽油能跑多遠.

A high mpg number means the car is thrifty; a low number means it drinks a lot. This is mainly a US way of speaking, and you still see it in Britain on car ads.

A high mpg number高的mpg數字 means the car is thrifty代表這輛車比較省油; a low number低的數字 means it drinks a lot代表它很耗油. This這 is mainly a US way of speaking主要是美式說法, and you你 still see it in Britain on car ads在英國的汽車廣告裡還是看得到.

Though actually, a US gallon and a UK gallon are not the same size, so the same car can have two different mpg numbers, and the British one looks “better.” In Taiwan, and in most of the world, people talk about litres and kilometres instead — how many kilometres you get from one litre, or how many litres you need for 100 kilometres.

Though actually不過事實上, a US gallon and a UK gallon美制加侖和英制加侖 are not the same size大小不一樣, so所以 the same car同一輛車 can have two different mpg numbers會有兩個不同的mpg數字, and the British one looks “better.”而英國那個數字看起來比較「漂亮」. In Taiwan, and in most of the world在台灣和世界上大多數地方, people人們 talk about litres and kilometres instead則是用公升和公里來說, how many kilometres you get from one litre像是一公升能跑幾公里, or how many litres you need for 100 kilometres或跑一百公里需要幾公升.

You say it as letters: em-pee-jee. It is ordinary, a bit technical, not slang.

You你 say it as letters是一個字母一個字母唸出來的: em-pee-jee就是em-pee-jee. It它 is ordinary是很普通的說法, a bit technical帶點技術性, not slang不是俚語.