音標(biāo)發(fā)音英式音標(biāo) [p??ren.i.?l]美式音標(biāo) [p??ren.i.?l]國(guó)際音標(biāo) [p?'reni?l]英式發(fā)音 美式發(fā)音 基本解釋adj. 多年生的；常年的；四季不斷的；常在的；反複的 n. 多年生植物詞根記憶per(全部) + enn(年) + ial→全年的；永久的per(全部) + enn(年) + ial→終年的per + enn(年) + ial→一年到頭的→長(zhǎng)期的同根派生adv性質(zhì)的同根詞perennially：永久地。n性質(zhì)的同根詞perennation：[植]多年生；多年生長(zhǎng)。perennial相關(guān)詞英漢例句A perennial is a plant that lives indefinitely.多年生植物是指能存活很多年的植物。the perennial problem of water shortage缺水這個(gè)老問(wèn)題I wonder at her perennial youthfulness.我對(duì)她青春常駐感到驚訝.the perennial problem of water shortage缺水這個(gè)老問(wèn)題A perennial is a plant that lives indefinitely.多年生植物是指能存活很多年的植物。perennial更多例句詞組短語(yǔ)短語(yǔ)perennial plant 多年生植物perennial river 常流河;常年河;常年性河流;四季不枯竭的河流perennial stream [地理]常流河;常劣;常流;常年河川Perennial Sunflower 野生曏日葵;野生曏葵;家死背日葵;生日花野生曏日葵perennial chamomile 黃金菊;黃金菊介紹perennial更多詞組英英字典劍橋英英字典 lasting a very long time, or happening repeatedly or all the time a plant that lives for several years柯林斯英英字典 You use perennial to describe situations or states that keep occurring or that seem to exist all the time used especially to describe problems or difficulties. A perennial plant lives for several years and has flowers each year. Perennial is also a noun. perennial劍橋字典perennial柯林斯字典專業(yè)釋義毉葯科學(xué)常年性Conclusion: The vocational environment is related with the allergic to dust mites in the patients of perennial allergic rhinitis among different occupational groups in Huainan . The labor protection should be strengthened to the specific occupational groups.結(jié)論：淮南地區(qū)不同職業(yè)中常年性變應(yīng)性鼻炎患者對(duì)塵蟎的過(guò)敏情況與職業(yè)環(huán)境有關(guān)，應(yīng)加強(qiáng)對(duì)特定職業(yè)人群的勞動(dòng)保護(hù)。生物學(xué)多年生的多年生長(zhǎng)的多年生植物多年生的;多年生植物