Containing no lead. In practice you will meet this word in one place: petrol (American English: gasoline).

Containing no lead不含鉛。 In practice實際上 you你 will會 in one place在一個地方 meet遇到 this word這個字：petrol (American English: gasoline)汽油（美式英文叫 gasoline）。

Unleaded petrol is the ordinary fuel every car uses now, and the word exists only because of history — for most of the twentieth century a lead compound was added to petrol to help engines run smoothly, and it turned out to be poisoning people, especially children.

Unleaded petrol無鉛汽油 is the ordinary fuel every car uses now是現在每輛車都在用的一般燃料， and the word exists而這個字的存在 only because of history純粹是因為歷史—— for most of the twentieth century在二十世紀的大半時間裡 to petrol汽油裡 was added加了 a lead compound一種鉛化合物 to help engines run smoothly來幫助引擎順暢運轉， and it turned out結果卻 to be poisoning people讓人中毒， especially children尤其是兒童。

Countries banned it one by one, so through the 1980s and 1990s pumps were labelled 'unleaded' to tell drivers this was the safe new kind. Today leaded petrol is gone almost everywhere, so 'unleaded' has quietly become just a name rather than a contrast.

Countries各國 one by one一個接一個 banned it禁用了它， so所以 through the 1980s and 1990s在一九八零到九零年代 pumps加油機上 were labelled會標示 'unleaded'「unleaded」 to tell drivers告訴駕駛人 this was the safe new kind這是安全的新款。 Today如今 leaded petrol含鉛汽油 is gone almost everywhere幾乎在所有地方都已經消失， so所以 'unleaded'「unleaded」 has quietly become已經悄悄變成 just a name rather than a contrast只是個名稱而不是對比詞。

British drivers still say 'fill it up with unleaded' and Americans still see 'unleaded' on the pump, even though there is nothing else to choose. You can use it as a noun on its own — 'twenty pounds of unleaded, please' — which is very common at the petrol station.

British drivers英國駕駛人 still say還是會說 'fill it up with unleaded'「加滿 unleaded」 and而 Americans美國人 still see還是會看到 'unleaded'「unleaded」 on the pump在油泵上， even though there is nothing else to choose儘管根本沒有別的可以選。 You你 can use可以把它 it as a noun on its own單獨當名詞用 — 'twenty pounds of unleaded, please'「請給我二十英鎊的 unleaded」 — which這 is very common非常常見 at the petrol station在加油站。

In Taiwan, note that we usually just say 無鉛汽油 or name the octane number (95, 98), so students may never have needed the English word until they rent a car abroad.

In Taiwan在台灣， note要注意 that we usually just say我們通常只會說 無鉛汽油「無鉛汽油」 or或者 name the octane number直接講辛烷值 (95, 98)（95、98）， so所以 students may never have needed學生可能一直沒機會用到 the English word這個英文字 until they rent a car abroad直到出國租車之前。

It is also used, much more rarely, of other things that once contained lead: unleaded paint, unleaded crystal glass. And there is a small joke you may hear in American cafés: 'unleaded' for decaf coffee — coffee with the powerful stuff taken out. It is playful and old-fashioned, but people do say it.

It它 is also used也會用在， much more rarely但比較少見， of other things that once contained lead那些曾經含鉛的東西上： unleaded paint無鉛油漆、 unleaded crystal glass無鉛水晶玻璃。 And而且 there is a small joke有個小玩笑 you may hear你可能會 in American cafés在美國咖啡館聽到： 'unleaded'「unleaded」 for decaf coffee指的是低咖啡因咖啡 — coffee with the powerful stuff taken out也就是把厲害的東西拿掉的咖啡。 It它 is playful and old-fashioned既俏皮又有點老派， but people do say it但大家真的會這樣說。

Pronunciation is worth a moment: the 'lead' here is the metal, so it rhymes with 'red', not with 'read/reed'. Say un-LED-id.

Pronunciation發音 is worth a moment值得注意一下： the 'lead' here這裡的 'lead' is the metal是指金屬鉛， so所以 it rhymes with 'red'跟 'red' 押韻， not with 'read/reed'不是跟 'read/reed' 押韻。 Say請唸 un-LED-id「un-LED-id」。