A turn-on is something that excites you, and in nearly every real use, sexually. It is a countable noun: "Confidence is a real turn-on." "That's a big turn-on for him." The opposite is turnoff (or turn-off), something that kills the attraction: "Bad manners are a total turnoff." Turnoff is actually the more useful of the pair for a learner, because it has stretched into ordinary non-sexual use — people say a boring teacher or a long form is a turnoff, meaning it makes you lose interest.

A turn-on is就是 something that excites you一樣讓你興奮起來的東西，and in nearly every real use而且在幾乎每一次真實的使用裡，sexually都是性方面的。It is a countable noun它是可數名詞：“Confidence is a real turn-on.”「自信真的很讓人心動。」、“That's a big turn-on for him.”「那對他來說非常有吸引力。」。The opposite is turnoff (or turn-off)相反詞是 turnoff（或 turn-off），something that kills the attraction一樣把吸引力澆熄的東西：“Bad manners are a total turnoff.”「沒禮貌完全讓人倒胃口。」。for a learner對學習者來說，Turnoff is actually the more useful of the pair其實是這一對裡比較有用的那個，because it has stretched into ordinary non-sexual use因為它已經伸進了平常、跟性無關的用法——people say人們會說 a boring teacher or a long form無聊的老師或很長的表單，is a turnoff是個 turnoff，meaning it makes you lose interest意思是它讓你失去興趣。

Turn-on has stretched far less; it stays mostly sexual, so if you say something at work is "a real turn-on" people will hear the sexual meaning and it will be awkward. This is the honest, useful point about the word: recognise it, be slow to produce it.

Turn-on has stretched far less伸展得少得多；it stays mostly sexual它大致停在性的意思上，so if you say所以如果你說 something at work工作上的某樣東西，is “a real turn-on”是 “a real turn-on”，people will hear the sexual meaning大家聽到的會是性的那個意思，and it will be awkward場面會很尷尬。This is the honest, useful point about the word關於這個字，最老實、最有用的一點是：recognise it認得它，be slow to produce it但慢一點自己拿出來用。

Note the shape carefully. The noun is written with a hyphen or as one word, turn-on / turnon, and the stress goes on TURN. The verb is two separate words with no hyphen: "You turn me on." Do not confuse either of them with the everyday verb turn on meaning to start a machine — "turn on the light", "turn on the air conditioner". Same two words, completely innocent, and by far the most common meaning; only the noun form carries the sexual sense.

Note the shape carefully仔細看它的形狀。The noun is written名詞寫成 with a hyphen or as one word帶連字號或連成一個字，turn-on / turnon，and the stress goes on TURN重音落在 TURN 上。The verb is動詞是 two separate words分開的兩個字，with no hyphen不加連字號：“You turn me on.”。either of them這兩個，with the everyday verb turn on和日常動詞 turn on，Do not confuse都不要搞混，meaning to start a machine那個意思是啟動機器——“turn on the light”開燈、“turn on the air conditioner”開冷氣。Same two words同樣的兩個字，completely innocent完全清白，and by far the most common meaning而且是最最常見的意思；only the noun form只有名詞形，carries the sexual sense帶著性的意思。

Register: casual spoken English, magazines, dating talk. Not for formal writing.

Register語域：casual spoken English隨性的口語、magazines雜誌、dating talk約會話題。Not for formal writing正式寫作不要用。