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，主要成分是洛【洛的主要成分】。

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，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】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.

加拿究者对【将】受验者随机分组，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【】者随机分组，一半接美沙酮的治疗，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】受验分组，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】受验者随机分组，一半接受酮的治疗，另一半每天接受乙酰吗，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，一半受美沙酮的治疗，另一半受注射二乙酰吗啡，主要成分是【为的主要成分】。