| 单词 | fern |
| 释义 | fern noun[C] uk/fɜːn/us/fɝːn/agreenplantwithlongstems,leaveslikefeathers, and noflowers 蕨；蕨类植物 Danita Delimont/Gallo Images/GettyImages Common plants
fern| American Dictionaryfern noun[C] us/fɜrn/agreenplantwithlongstems,wide,thinleaves, and noflowers Examplesoffernfern Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants. From theCambridge English Corpus These taxa comprise cycads, lycopods and ferns (although not all ferns are restricted to humid settings). From theCambridge English Corpus The species composition and the numbers of individuals and species of oribatid mites in the litter were affected by the size of the ferns. From theCambridge English Corpus Elements of the local mire vegetation,fernspores and other palynomorphs were not included in the pollen sum. From theCambridge English Corpus Both white mangrove and leatherferncan become dominant in disturbed areas, which may explain their increased representation. From theCambridge English Corpus The resulting channel bars will have provided more extensive areas of clastic substrates, which will have favoured thefern-pteridosperm complex. From theCambridge English Corpus In the ferns, this evidence can be enhanced by additional data from reproductive organs. From theCambridge English Corpus Understorey plants were not identified to species, but were categorized as herbs, ferns, herbaceous vines, palms, t rees and lianas. From theCambridge English Corpus We have tried to evaluate the cost-effectiveness of the bare soil practice, starting from a soil occupied by a thick cover of ferns. From theCambridge English Corpus Out of this subset, we randomly selected 20 ferns from which to make water collections. From theCambridge English Corpus The meandering facies generally have greater abundance of liverworts and ferns (that is, moisture loving forms). From theCambridge English Corpus The macroscopic forms of aquatic vegetation denoted as aquatic macrophytes include macroalgae, some species of ferns and angiosperms inhabiting a wetland. From theCambridge English Corpus Environmental triggers of fertility are discussed and phenological patterns are compared with ferns and angiosperms from other habitats. From theCambridge English Corpus This suggests that epiphytes should have a greater opportunity to establish on angiosperm trees than on tree ferns. From theCambridge English Corpus Its objective is to examine whether fungal andfernspores can survive the harsh environmental conditions in space during a long-term stay. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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