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，主成洛因【为洛因的主成】。

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.

加拿究者对【将】受验者随机组，一半接受美沙酮治疗，另一半每天接受注射二乙酰吗啡，主成是海洛因【为海洛因主成】。

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】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啡，主成分因【为因的主成分】。

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.

加拿大的对【将】受验随机分组，一半接受美沙酮的治疗，另一半每天接受注射二乙酰吗啡，主分是海洛因【为海洛因的主分】。

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，主成分是海洛因【为海洛因的主成分】。

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【】验者随机分组，一半接美沙酮的治疗，另一半每天接注射二乙酰吗啡，主成分是海洛因【为海洛因的主成分】。

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吗啡，主成分是【为的主成分】。

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啡，主成分因【为因的主成分】。

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，一接受美沙酮治疗，另一接受注射二乙酰吗啡，成分是海洛因【为海洛因成分】。