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rare plant
释义
rare plant
Encyclopedia
农学
野生植物
释
rare plant
稀有植物
有广义和狭义之分。广义稀有植物指那些在经济、科学、文化和教育等方面具有重要意义而现存数量稀少的植物,又称珍贵稀有植物,如金花茶(Camellia petelotii)。狭义稀有植物指分布范围狭窄,数量极少,如普陀鹅耳枥(Carpinus putoensis,仅存一株),但在特定生存条件下种群的生存和繁衍相对稳定;或者虽有较大的分布范围,但只是零星分布的植物,如中国蕨(Aleuritopteris grevilleoides),金钱松(Pseudolarix amabilis)。通常使用其广义概念。
随便看
direction of recession
direction of R^n
direction of Rn
direction of search
direction of the selected titles
direction of twist of yarn
direction parameter
direction ratio
direction relation
direction sign
direction vector
directive
Directive 2001/29/EC of the European Parliament and of the Council of 22 May 2001 on the Harmonization of Certain Aspects of Copyright and Related Rights in the Information Society
directive gain
directive indoctrinate
Directive on Privacy and Electronic Communications
Directive on the Legal Protection of Databases
Directive on the Protection of Individuals with Regard to the Processing of Personal Data and on the Free Movement of Such Data
directive probability method
Directives on the Promotion of Putonghua of the State Council
directivity
directivity and gain of antenna
directivity factor
directivity function
directivity function of microphone
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