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.

加拿大研究对【将】随机分组，一半接美沙酮治疗，另一半每天接注射二乙酰吗啡，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.

加拿大研究对【将】受机分组，一半接受美沙酮治疗，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，要成分是海洛因【为海洛因的要成分】。

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】受验者组，一半接受美沙酮的，另一半每天接受注射二乙酰吗啡，主要成是海洛因【为海洛因的主要成】。

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】验者随机分组，一半接美沙酮的治疗，另一半每天接二乙酰吗啡，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，分是海洛因【为海洛因的分】。

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吗啡，主要成分是因【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.

加拿大研究者对【将】验者随机分组，一半沙酮治疗，另一半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.

加拿大研究者对【将】受验者随机分组，一半接受美治疗，另一半每天接受注射二乙酰吗，主要成分是海洛因【为海洛因主要成分】。