ragweed

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++

Related topics: Plants

rag·weed /ˈræɡwiːd/ noun [uncountable]  HBPMIa North American plant that produces a substance which causes hay fever 豚草〔一种北美洲植物，可引起花粉病〕

rag·weed nounChineseSyllable  

ragweed
rag‧weed /ˈræɡwiːd/ noun [uncountable]
a North American plant that produces a substance which causes hay fever

rag·weedBrE /ˈræɡwiːd/ 🔊NAmE /ˈræɡwiːd/ 🔊 noun [uncountable] a N American plant with small green flowers that contain a lot of pollen, which causes hay fever in some people 豚草（北美植物，其绿色小花含大量花粉，可引起枯草热）