A sat-nav is a little computer in a car that tells you which way to go. It talks to satellites in the sky, works out where you are, and then speaks or shows the next turn.

A sat-nav is a little computer in a car是裝在車上的一個小電腦，that tells you which way to go會告訴你該往哪裡走。 It talks to satellites in the sky它會跟天上的衛星連線，works out where you are算出你現在的位置，and then speaks or shows the next turn再用語音或畫面告訴你下一個要轉的地方。

The name is short for satellite navigation, and it is especially British; people say it the way they say “fridge” for refrigerator — everyday, not fancy.

The name is short for satellite navigation這個字是 satellite navigation（衛星導航）的縮寫，and it is especially British而且是特別英式的說法：people say it the way they say "fridge" for refrigerator大家講它的方式，就跟用「fridge」代替「refrigerator」一樣——everyday, not fancy——日常口語，不是正式用語。

Though actually, a lot of drivers now just use a phone on the dashboard, and they still call that their sat-nav if they are British. In American English the usual word is GPS, even when the box is doing the same job.

Though actually不過其實，a lot of drivers now just use a phone on the dashboard現在很多駕駛只是把手機架在儀表板上用，and they still call that their sat-nav if they are British如果他們是英國人，還是會把那個叫做他們的 sat-nav。 In American English the usual word is GPS美式英語一般會說 GPS，even when the box is doing the same job就算那個機器做的是一樣的事。

People also stretch it: “You’re my sat-nav” can mean “you keep telling me where to turn,” as a joke, not a real machine.

People also stretch it大家也會把這個字用得更寬："You're my sat-nav" can mean "you keep telling me where to turn,"「You're my sat-nav」可以是說「你一直在告訴我該往哪走」，as a joke, not a real machine這是開玩笑的說法，不是真的有台機器。