1)precuneus楔前叶
2)Sphenophyllum楔叶
英文短句/例句
1.A SPHENOPHYLLEAN PLANT WITH HETEROPHYLLOUS FOLIAGE OF "SPHENOPHYLLUM THONII" GROUP FROM SHANSI FORMATION IN NORTHERN SHANXI晋北山西组具异型叶的“畸楔叶”组植物
2.R. russatum, R. cuneatum and R. fastigiatum are rare to be seen in other places in NW Yunnan, which could be considered as the conservation targets in the Lashihai region.其中紫蓝杜鹃、楔叶杜鹃和密枝杜鹃在滇西北其它地方少见，可列为保护目标。
3.cleat hook, for blind cords, of base metal百叶窗拉绳的楔子钩,贱金属制
4."Liver: Largest gland in the Body, with several lobes."肝:脊椎动物体内最大的器官,呈楔形叶状。
5.To fix in place or tighten with a wedge.把…楔住，把…楔牢
6.wedge breech mechanism楔形炮闩，楔式闭锁机
7.To connect with a tongue-and-groove joint.楔紧用楔形部件使密接
8.AN ANALYSIS OF THE WEDGE MECHANISMS AND THE DESIGN OF A WEDGE MECHANISM WITH DUPLEX WEDGE ANGLES斜楔机构的分析及双楔角斜楔机构的设计
9.base-plate wedge基片楔突 -噬菌体
10.A wooden wedge for cleaving rock.木楔用来劈裂岩石的木楔
11.A heavy hammer having a wedge-shaped head and used for splitting logs.楔手重锤有楔形头的重锤，用于劈圆木
12.A wedge or other braking device.楔子，垫石楔子或其他刹车装置
13.A wedge - shaped charge pointing downward.楔形普通图记一种头朝下的楔形图章
14.One of the triangular characters of cuneiform writing.楔形字楔形方字的三角形字之一
15.Spaceband: Spacing pieces used by line-casting machines.活楔:行式排铸机所用的楔。
16.Forming principle of heavy section shrinkage cross wedge rolling by single wedge楔横轧一次楔大断面收缩率成形机理
17.A wedge-shaped piece of material, such as wood, that is fastened onto something, such as a spar, to act as a support or prevent slippage.楔子，防滑木楔状物，如木楔子，为了支撑或防滑固定在某物上，如翼梁
18.Study on working mechanism and conditions of wedge caulking and wedge refunding of wedge typed overrunning clutch with assistant-ring带辅助环的楔块式超越离合器工作机理及楔紧和退楔条件的研究
相关短句/例句
Sphenophyllum楔叶
3)Sphenozamites楔羽叶属
4)Ribes Diacanthum楔叶茶
1.A New extraction and stability of yellow pigment from Ribes Diacanthum is reported.从楔叶茶果实中提取了食用黄色素 ,研究了该黄色素的性能及稳定性。
5)Sphenophyllum lungtanense龙潭楔叶
1.Based on materials from Upper Devonian (Famennian) Wutong Formation, Shizikou Section, Chaohu City of Anhui Province, the leaf shape and venation of Sphenophyllum lungtanense Gothan et Sze are restudied.基于安徽省巢湖市狮子口剖面上泥盆统(法门阶)五通组的标本,对龙潭楔叶Sphenophyllum lungtanense Gothan et Sze的叶形和脉式等重要特征取得了新认识。
6)Sphenophyllales楔叶目
1.Further Study of Sphenophyllum Lungtanense, with a Discussion on the Evolution of the Late Devonian Sphenophyllales in South China;龙潭楔叶的再研究——兼论华南晚泥盆世楔叶目的演化
延伸阅读
楔叶 楔叶类中已绝灭的楔叶目的代表属，出现于晚泥盆世到晚二叠世，在晚石炭世早期至早二叠世最繁盛，个别延续至三叠纪。 楔叶是小型的木质藤本植物，茎细长，一般直径不超过1厘米,单轴式分叉，节间表面纵脊在节部直通。有的在节间部位有刺，节部有不定根。茎、枝解剖为星状中柱，无髓，初生木质部三角形，次生木质部发达，管胞伸长，末端尖，具圆或椭圆的具缘纹孔。 叶轮生。每轮叶数常为3的倍数，通常为6枚，偶有多于此数者。叶一般作楔形，叶脉两歧分叉成扇状展开，二叠纪有的种叶脉在基部汇合为具"中脉"状。楔叶有6枚等大者，也有具镶嵌性的3对型叶，使具叶枝有背腹性。 孢子叶通常聚集成紧密的孢子叶穗，位于枝顶端或节部，节间短，每一孢子叶由上下两个裂片组成：上裂片载孢子囊，下裂片为不孕的苞片。构造复杂、形式多样，统称为楔叶穗。 晚泥盆世至早石炭世的种，叶轮一般较小，叶片细线形，二歧式深裂。晚石炭世的种,叶狭楔形，较大,并出现个别三对型叶。二叠纪的种，叶最大，等叶型和三对型都很多，两侧常不对称。有的具"中脉"。
