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Nostoc flagelliforme is a kind of terrestrial filamentous nitrogen-fixing cyanobacterium distributing in arid and semiarid region of north-western China.It has a great economic and ecological value.So its fundamental study and application study for protection and development have been studied in different ways.
发菜是一种固氮陆生蓝藻,我国主要分布于西北干旱半干旱荒漠草原地带,具有重要的经济和生态价值,围绕发菜资源基础研究和保护开发的应用研究已广泛开展。
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Any of numerous tailless, aquatic, semiaquatic, or terrestrial amphibians of the order Anura and especially of the family Ranidae, characteristically having a smooth, moist skin, webbed feet, and long hind legs adapted for leaping.
蛙一种无尾、水生、半水生或陆生两栖动物,属无尾目,尤属蛙科,以其光滑湿润的皮肤、蹼足和修长善跳的后腿为特征
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Frog Any of numerous tailless, aquatic, semiaquatic, or terrestrial amphibians of the order Anura and especially of the family Ranidae, characteristically having a smooth, moist skin, webbed feet, and long hind legs adapted for leaping.
蛙:一种无尾、水生、半水生或陆生两栖动物,属无尾目,尤属蛙科,以其光滑湿润的皮肤、蹼足和修长善跳的后腿为特征
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Leaves evergreen, deciduous or semideciduous, alternate, sometimes clustered at stem apex; margin entire, very rarely crenulate, abaxial indumentum sometimes with a pellicle (a thin skinlike layer on the surface).
灌木或乔木陆生的或附生,常绿的叶,落叶或半落叶,互生,有时在茎先端的簇生;边缘全缘,极少具细圆齿,背面毛被有时具一表膜。
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Antherodes 3-sect; panicles terminal or cincinni numerous and aggregated in spathelike involucral bracts (in latter case pedicels with sheathlike, membranous bracteoles); plants terrestrial herbs, mostly without elongate and horizontal rhizomes.
Antherodes 3全裂;顶生的圆锥花序或蝎尾状聚伞花序多数和在佛焰苞状总苞片内聚生(在后半箱花梗具鞘状,膜质内);植株陆生草本,多数没有拉长和水平根状茎。
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plant gum:植物胶
[简介]构成主要有D-半乳糖醛酸聚合体的果胶酸,以D-甘露糖醛酸和L-葡萄糖醛酸为组成单糖的藻酸. 陆生植物的细胞壁中有很多多聚糖醛酸半纤维素. 被称为植物胶(plant gum)和
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urostyle:尾杆骨
一般说来,水栖鲵螈类的躯干椎12~16枚,尾椎数大多在20枚以上,原始种类(异鲵Xenobius)的前面几枚尾椎尚留有尾肋的遗迹;半陆生蛙蟾类的进化趋势却是脊柱变短而躯干椎的数目减少至7枚左右,尾椎骨愈合成一根棒状的尾杆骨(urostyle),这是由于水栖生活
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solenoglyphic tooth:管牙
上颌的前面具一对管状的大型毒牙,称管牙(solenoglyphic tooth),毒牙平时向后倒放在口腔内,张口时,随上颌骨而直立. 全为卵胎生. 包括陆生、树栖、半水栖和穴居的种类. 分布很广,包括欧洲、亚洲、非洲和美洲等地. 分为以下两亚科:蝰亚科(Viperinae)在眼与鼻孔之间不具颊窝.