半圆形

一般先从下部叶片开始发病，逐渐向上蔓延。病斑出现在叶缘和叶身，呈近圆形或半圆形斑点，叶正面斑点为褐色，背面为浅褐色。

At first , the spots occurred on the margin or blade of leaf , which were approximate rounds or half round taupe spots . The colour of spots on the upper epidermis was brown and light brown on the lower epidermis .

我们坐在炉火前，围成一个半圆形。

We sat in a semicircle round the fire .

他标示出了一个半径大约为30英里的半圆形。

He indicated a semicircle with a radius of about thirty miles .

他们围着老师的椅子站成半圆形回答问题。

They stood in a semi-circle round the teacher 's chair and answered questions .

极富创意的办公桌，有着不同形装如三角形、半圆形、曲尺形及四边形，以创造您个人品位的办公室

Various shapes of returns like triangular , semi-circular are available for cresting your own office .

半圆形的国会大厅让林肯中心（LincolnCenter）的任何建筑都相形见绌；

A semicircular Congress Hall that dwarfs any structure at Lincoln Center .

典型CT表现为新月形或半圆形低密度（纤维包膜）。

The typical feature of CT was a crescent or semicircle area with slightly low density ( fibroid membrane ) .

半圆形凸起与凹陷地形对SH波的散射

Scattering of SH-waves by a semi-cylindrical hill and a semi-cylindrical canyon

SH波作用下半圆形凸起地形内波函数的求解

On solution of wave function of semi-cylindrical protruding landscape under SH-wave

阶跃SH波作用下半圆形凹陷地形的瞬态反应&长期解

Transient response of a semi-cylindrical canyon by step sh-wave-long time solution

平面SH波在相邻多个半圆形凹陷地形上的散射

Scattering of SH - waves by multiple semi - cylindrical canyons

SH波在含圆形孔洞的半圆形凸起处的散射

Scattering of SH-wave by a semi-cylindrical hill-like protruding with a cavity

SH波对结构表面上含有多个半圆形介质夹杂的散射

Scattering of SH-wave by the structure surface with multiple semi-cylindrical medium inclusion

SH波对浅埋圆形结构附近半圆形沉积层的散射

Scattering of SH-Wave by Semi-Cylindrical Alluvial Valley above Subsurface Structure

与土体部分脱离的埋置半圆形基础与SH波的动力相互作用

Dynamic Interaction between SH Wave and Embedded Semi-cylindrical Foundation Partially Unbounded from Soil

Ⅳ型不整型。C（1,2）椎管的形状为圆型，向下至C6，通过半圆形逐步过渡到三角形（C6占81.31%）；

The shape of the spinal canal at C 1,2 the circular and it changed gradually from a semicircular to a triangular type at C_6 ( 81.31 % ) .

SH波入射时浅埋圆形结构附近半圆形沉积谷地的地震动

Ground motion of semi-cylindrical alluvial valley above subsurface circular structure impacted by SH waves

利用本文构造的Green函数，对SH波作用下浅埋裂纹附近的半圆形凸起地形的地震动问题进行了讨论。

The Green function is employed to discuss the influence of subsurface crack on the motion of semi-cylindrical hill under SH wave .

SH波入射时多个半圆形沉积谷地附近浅埋圆形孔洞的动力分析

Dynamic response of shallow-embedded cylindrical lining structure below semi-cylindrical alluvial valleys to incident SH waves

SH波对浅埋圆柱形弹性夹杂附近多个半圆形凸起的散射

Antiplane response of multiple semi-cylindrical hills above a subsurface elastic cylindrical inclusion to incident SH waves

受三点、四点弯曲半圆形单边裂纹SIF的研究

Studying on SIF For Semi-Cycle Edge Cracks Under Three and Four Bending

枕骨蛛网膜颗粒压迹在CT上表现为半圆形、半卵圆形或浅弧形，少数可呈穿凿样骨质缺损，深达板障或外板。

Characteristic findings of occipital arachnoid granulations on CT were semiorbicular or semilunar depression of occipital inner table , or a punched-out like bone defect from the inner table into the outer table .

SH波入射时半圆形凸起地形附近浅埋圆形衬砌结构的动应力分析

Dynamic analysis of the scattering of SH-wave by a semi-cylindrical hill above a shallow-embedded cylindrical lining structure in half space

此外，半圆形透水坝头可使坝头冲刷坑深度提高05～10m。

In addition , scour depth around the semi circular permeable groin head will decrease by 0.5 ~ 1.0 m.

结果：（1）主动脉上窦：MRI显示20例，占95%，其形态有半圆形、三角形、新月形和不规则形。

Results : ( 1 ) On MRI , the superior pericardial recess was seen in 20 cases ( 95 % ), appearing as semicircle line , triangle , crescent or irregular .

本文利用复变函数和多极坐标方法研究平面SH波对相邻多个半圆形凹陷地形的散射问题。

In this paper the scattering of SH-wave by multiple semi-cylindrical canyons are studied by using complex function and multi-polar coordinate method .

本文采用辅助函数的思想，利用复变函数和多级坐标的方法给出了SH波入射条件下多个半圆形沉积谷地附近浅埋圆形孔洞动力分析问题的解答。

Dynamic response of a shallow-embedded cylindrical lining cavity below semi-cylindrical alluvial valleys to incident SH waves is studied by using complex function .

本文从力学上说明V形、矩形和半圆形刻槽槽孔可以有效控制裂纹的初始点和扩展方向，槽孔断裂控制爆破是一种有效的石材开采方法。

The fact is proved by mechanics that groove can control initial position and direction of crack expanding effectively , the groove fracture controlled blasting is an effective method in mining masonry materials .

采用契合思想，利用复变函数法研究了地下弹性夹杂与地面上半圆形凸起地形对SH波的散射问题。

Scattering of SH-wave by a semi-cylindrical hill above a subsurface elastic cylindrical inclusion in half-space was studied based on " conjunction " by complex function .

对SH波作用下，半圆形凸起与半圆形凹陷或半圆形沉积层相连地形的散射问题进行了研究。

This paper presents the models and solutions for the scattering of SH wave by a semi-cylindrical hill adjoins a semi-cylindrical canyon or a semi-cylindrical alluvial valley .