Adrenalin is a chemical your body makes when you are afraid, angry, or suddenly excited. It makes your heart beat faster, sharpens you, and gets you ready to run or fight — the old “danger” setting. Doctors and biology teachers mean that chemical.

Adrenalin isAdrenalin是 a chemical your body makes你身體會製造出來的一種化學物質 when you are afraid, angry, or suddenly excited在害怕、生氣，或突然興奮時。It makes your heart beat faster它讓你的心跳加快, sharpens you讓你變得更敏銳, and而 gets you ready to run or fight準備好逃跑或戰鬥——the old "danger" setting這是古老的「危險」設定。Doctors and biology teachers醫生和生物老師 mean that chemical講的就是這種化學物質。

Though actually, in everyday talk people stretch it a long way: “I did it for the adrenalin” often just means “for the thrill,” and “adrenalin rush” is the jolt you feel on a roller coaster or before you walk on stage. That loose use is extremely common; it is not a lab measurement.

Though actually不過其實，in everyday talk在日常對話裡 people stretch it a long way大家會把這個字用得很鬆："I did it for the adrenalin"「I did it for the adrenalin」 often just means常常就只是 "for the thrill,"「為了刺激感」的意思, and而 "adrenalin rush"「adrenalin rush」 is指的是 the jolt you feel你感覺到的那種猛然一衝 on a roller coaster or before you walk on stage在雲霄飛車上，或上台前。That loose use is extremely common這種鬆散的用法非常普遍；it is not a lab measurement它不是實驗室裡的測量數字。

You will also see the spelling adrenaline, with an e on the end. In speech they sound the same; the e-spelling is now the usual one in many books. An older trademark used the shorter form.

You will also see the spelling你也會看到拼法 adrenalineadrenaline, with an e on the end尾巴多一個e。In speech講話的時候 they sound the same它們聽起來一樣；the e-spelling is now the usual one帶e的拼法現在是比較常用的那種 in many books在很多書裡。An older trademark一個比較舊的商標 used the shorter form用的是比較短的那個拼法。