芍药是多年生草本植物，而牡丹是落叶灌木。
The peony is a herbaceous perennial, while the tree peony is a deciduous shrub.
对美国芍药牡丹协会的特色奖项即APS金牌奖，做了系统介绍。
The paper systematically introduces a distinctive award, APS Gold Medal from the American Peony Society.
这是芍药吗？不，这是牡丹。
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