marsh elder

同根派生

tall annual marsh elder common in moist rich soil is central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever.
一种一年生的、高大的沼生接骨木，它常见于北美中部的潮湿沃土上，造成接触性皮炎；产生许多花粉，是引起花粉热的主要原因。
Some elder people enjoy Beijing opera immensely.
有些上了年纪的人非常喜爱京剧。
It's dangerous to be alone in the marsh.
一个人在沼泽地里是很危险的。
He is no less clever than his elder brother.
他和他的大哥一样聪明。
The elder son has precedence over the younger one.
长子较之非长子享有优先权。