So it is essential to study the mechanisms of maturation, juvenility retention and rejuvenation before uniform, true-to-type, long-term cloning of trees can be achieved.

为实现树木长期与原种一致的无性繁殖，必须了解其成熟作用和幼态保持的机理，选取幼态组织作为繁殖材料或采用人工复壮措施。

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Furthermore, this paper also probes into the pattern of Zhongjing's prescriptions on the treatment of phlegm retention in attempt to understand the true meaning of phlegm retention treatment.

本文亦分析探讨仲景治疗痰饮的用药组方规律，以期了解痰饮治则真义。

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