The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主要成分因【为因的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主要成分是海【海的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机分组，一接受美沙酮的治疗，另一接受注射二乙酰啡，主要成分是海【为海的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰，主要成分是【为的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究对【将】受机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主要成分是海洛因【为海洛因的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大研究者对【将】验者随机分组，一美沙酮治疗，另一每天注射二乙酰吗啡，主要成分是海洛因【为海洛因主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗，成分是海洛因【为海洛因的成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究对【将】受机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主要成分是海洛因【为海洛因的主要成分】。

The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.

加拿大的研究者对【将】受验者随机组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主要是海洛因【为海洛因的主要】。