The definitions of curvilinear period,functional period and folium curve are introduced.
引入了曲线周期、函数周期以及叶形线的概念,给出了曲线对称性的判定条件,分别构造了谐波叶形线,齿轮叶形线和齿纹叶形线,分别给出了它们的函数表达式、函数周期、曲线周期、极点处的切线以及参数与叶数、叶形之间的关系。
A thin, leaflike layer or stratum occurring especially in metamorphic rock.
叶形线薄的叶状地层，尤其出现于变质岩中
nematoparenchymatous thallus
线形薄壁组织叶状体
tropical epiphytic ferns with straplike fronds.
热带附生蕨类，叶片成线形。
two-lobe epitrochoidal shape
双叶长短辐圆外旋轮线形状
Fixture Modification for Linear Cutting Dovetail Groove for Stationary Blade Attachment
线切割燕尾形静叶榫槽工艺装备改造
Leaves linear to lanceolate, thin and soft, gradually tapered end of branch.
叶线形或披针形，薄而且软，在枝条的末端缓尖。
marsh plant having elongated linear leaves and round prickly fruit.
沼泽植物，有拉长的线形叶子和圆形多刺果实。
wiry tufted perennial of the eastern United States with stiff erect rough stems, linear leaves and large violet flowers.
美国东部线形丛生多年紫菀，坚硬的立茎，线形叶片，紫色大花。
of a leaf shape; featherlike; having leaflets on each side of a common axis.
一种叶子形状；羽毛状；在每个公共轴线附近都有小叶。
Cladistic Analysis of Clematis sect. Campanella Tamura (Ranunculaceae) from Morphological Characteristics
铁线莲属尾叶铁线莲组(毛茛科)基于形态学证据的分支系统学
bellflower common in marshes of eastern North America having lanceolate linear leaves and small whitish flowers.
生长与北美东部的沼泽地带，有矛尖形的线形叶和白色的小花。
Shaped like a leaf.
叶状的形状象树叶的
genus of western North American low-growing herbs having linear woolly leaves and large pink flowers.
北美西部一个矮生草本植物属，叶线形，有绒毛，花大，粉色。
Consist of housing, impeller, motor, base and connection box.
圆形管道风机系列主要由外壳、叶轮、电机和接线盒组成。
stiff perennial of the eastern United States having small linear leaves and numerous tiny white flower heads.
美国东部一种多年生坚硬紫菀，线形小叶，无数白色小花。
genus of Old World herbs with linear entire leaves and yellow or purple flower heads.
旧大陆一个草本属，线形完整叶，黄色或紫色头状花序。
a plant of the genus Tofieldia having linear chiefly basal leaves and small spicate flowers.
岩菖蒲属的一种植物，具有线形的基生叶和小的穗状花。
Evaluation of Operation State and Diagnosis of Invisible Fault for Overhead Transmission Lines Based on Bayesian Networks;
基于贝叶斯网络的架空输电线路运行状态评估及隐形故障诊断