單詞
caffeine
英 ['k?fi?n]
美['k?fin]
基本信息
- n. [有化][藥] 咖啡因；茶精（興奮劑）
擴(kuò)展詞匯低頻詞CET6+
助記提示
1. 音譯“咖啡因”。
中文詞源
caffeine 咖啡因
來自cafe, 咖啡。-ine, 化學(xué)后綴，見cocaine.
英文詞源
- caffeine
- caffeine: see coffee
- caffeine (n.)
- trimethyl-derivative of xanthine, 1830, from German Kaffein, coined by chemist F.F. Runge (1795-1867), apparently from German Kaffee "coffee" (see coffee) + chemical suffix -ine (2) (German -in). The form of the English word may be via French caféine.
雙語例句
- 1. As little as 50mg of caffeine can produce pharmacological effects.
- 僅僅50毫克的咖啡因就能產(chǎn)生藥理效果。
來自柯林斯例句
- 2. The caffeine in coffee can jangle the nerves.
- 咖啡中的咖啡因會使神經(jīng)緊張。
來自柯林斯例句
- 3. Caffeine can cause palpitations and headaches.
- 咖啡因會引起心悸和頭痛。
來自柯林斯例句
- 4. As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.
- 憑經(jīng)驗估計，一杯過濾咖啡約含80毫克咖啡因。
來自柯林斯例句
- 5. The shaking inside may be due to low blood sugar, too much caffeine or too many cigarettes.
- 心悸可能是由于低血糖、咖啡因過量或抽煙過多。
來自柯林斯例句
caffeine相關(guān)單詞