以杉木屑为原料制备木质纤维素，采用静态吸附、蒸馏水和80%乙醇分段洗脱等实验，研究其对茶儿茶素类及咖啡因选择性吸附作用。
Lignocellulose was prepared from cedar sawdust and used to isolate caffeine and tea catechins from tea extract by static adsorption and gradient elution using water and 80% ethanol.
该项在美国20个主要城市开展的调查共有两千人参加，主要针对咖啡、茶、巧克力、苏打水、能量饮品及咖啡因片剂在这些城市的消费情况进行了访问。
The survey looked at consumption of coffee, tea, chocolate, sodas, energy drinks and caffeine pills in 20 major cities in the United States by interviewing 2, 000 people.
该项在美国20个主要城市开展的调查共有两千人参加， 主要针对咖啡、茶、巧克力、苏打水、能量饮品及咖啡因片剂在这些城市的消费情况进行了访问。
The survey looked at consumption of coffee, tea, chocolate, sodas, energy drinks and caffeine pills in 20 major cities in the United States by interviewing 2,000 people.
如果你对咖啡因的作用特别敏感，那么即便是少量的咖啡因——比如一杯咖啡或是茶——就能导致一些不良效果，如焦虑、不安、易怒及睡眠问题等。
If you're susceptible to the effects of caffeine, just small amounts - even one cup of coffee or tea - may prompt unwanted effects, such as anxiety, restlessness, irritability and sleep problems.
因为咖啡因对儿童神经及心血管系统有危害作用，含咖啡因的饮料包括苏打水都应该避免饮用。
Because caffeine has been associated with harmful neurologic and cardiovascular effects in children, caffeine-containing beverages, including soda, should be avoided.
目的研究电穿孔及离子导入时电场方向对分子型药物咖啡因经皮渗透的影响。
Objective to study the effect of electric field direction on the percutaneous penetration of the non-ionic drug caffeine mediated by skin electroporation and iontophoresis.
除了声称可乐不会致儿童发胖及损害牙齿外，这则整版的平面告白还试图改变公家对付可乐中含有大量咖啡因的观点。
As well as claiming Coke did not make children fat or harm their teeth, the full-page print ads sought to combat public perceptions that Coke was packed with large amounts of caffeine.
咖啡因一种苦味的白色生物碱，C8H10N4O2，通常得自咖啡或茶，在药品中主要作为温和兴奋剂及治疗特定的头痛病。
A bitter white alkaloid, C8H10N4O2, often derived from tea or coffee and used in medicine chiefly as a mild stimulant and to treat certain kinds of headache.
咖啡因一种苦味的白色生物碱，C8H10N4O2，通常得自咖啡或茶，在药品中主要作为温和兴奋剂及治疗特定的头痛病。
A bitter white alkaloid, C8H10N4O2, often derived from tea or coffee and used in medicine chiefly as a mild stimulant and to treat certain kinds of headache.
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