Most devastatingly, however, there are no randomized, double-blinded placebo controlled clinical trials that compare the success of quitting smoking by using smokeless tobacco versus using a placebo.
然而，极具讽刺的是，通过使用无烟烟草戒烟与使用安慰对照组相比，临床对照控制组没有进行随机的双盲试验。
The results indicated that in intervention group the diet sodium decreased. The diet potassium increased, smoking rate decreased and the people who controlled the total diet amount increased.
结果表明：干预组对象膳食钠减少、膳食钾增加、吸烟人数下降、控制食物总摄入量人数上升；
The same results were obtained when the smoking factor was controlled.
当控制吸烟因素后，仍得同样结果。
Unlike some other siesta studies, his was controlled for diet, smoking, exercise and other relevant variables.
与其他关于午休的研究不同的是，他的研究控制了饮食、吸烟、运动和其他相关的变量。
Methods: A randomized and double-blind controlled clinical trial was conducted for smoking cessation.
方法：采用随机、双盲、安慰剂平行对照研究。
Traditional methods include dehydration, smoking, salting, controlled fermentation, and candying; certain spices have also long been used as antiseptics and preservatives.
传统的方法有脱水、烟熏、腌渍、发酵、蜜饯等，某些香料长久以来也被用作防腐剂来保存食物。
Together, the studies followed more than 200,000 volunteers over about a decade of their lives, and controlled for other risk factors, like age and smoking.
这些报告一共跟踪调查了20万志愿者近十年的生活，减少其他因素的影响，比如年龄和吸烟。
Other disturbing factors, including smoking, drinking, and taking coffee, were also controlled. All patients had standing, sitting and supine postures in sequence respectively.
试验日所有受试者停服降压药物并且避免吸烟、饮酒及饮用咖啡等影响准确测量血压的干扰因素。
Confounding factors also were controlled for including smoking, body mass index, age, and follow-up time.
因素也进行了对照，包括吸烟、体重指数、年龄及随访时间。
Bupropion has not been tested in controlled trials for either smoking or depression in pregnant women.
酮在针对吸烟或者有抑郁症的孕妇的对照实验中还没有被检测。
The controlled release technique was used to improve the efficiency of some existing agents such as sulfur dioxide and chlorine dioxide. Some combination agents " 929 ", 949 ", "Dimei" smoking."..
报道了作者利用控制释放技术对二氧化硫、二氧化氯制剂的研究，以及作者研制的“929”、“949”、“敌霉烟剂”的应用。
The controlled release technique was used to improve the efficiency of some existing agents such as sulfur dioxide and chlorine dioxide. Some combination agents " 929 ", 949 ", "Dimei" smoking."..
报道了作者利用控制释放技术对二氧化硫、二氧化氯制剂的研究，以及作者研制的“929”、“949”、“敌霉烟剂”的应用。
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