“杨炎”是个多义词，它可以指杨炎（梁羽生武侠小说中人物）, 杨炎（唐德宗时宰相）。
两税法是唐德宗时宰相杨炎制定的，于建中元年(公元780年)颁布，此后在中国历史上一直沿用了八百年之久。
Enacted by Prime Minister Yang Yan, the Double-tax Law was promulgated in 780 when De-zong, an emperor of the Tang Dynasty, came into throne; thereafter it had been in operation for 800 years.
虽然没有强大的柳树，它具有更高的杨素内容，绣线菊的水杨酸给它做一个温和的抗炎作用和潜力，以减少发热期间感冒或流感。
While not as potent as willow, which has a higher salicin content, the salicylates in meadowsweet do give it a mild anti-inflammatory effect and the potential to reduce fevers during a cold or flu.
邵景范，杨小进，覃宇冰，等。罕见的小儿股骨干浆细胞性骨髓炎一例。中华小儿外科杂志，2007,28 (8)：396。
Shao JF, Yang XJ, Qin YB, et al. Plasma cell osteomyelitis of children femur: one case report. Chinese Journal of Pediatric Surgery, 2007, 28 (8) : 396.
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