In this paper , two theorems on chord at contact equation a nonsingular conic have been proved.

Pascal's Theorem points of intersection of opposite sides a hexagon inscribed in a conic are collinear.

帕司卡定理:给定一个圆上的六边形,则此六边形三对对边直线的交点在同一直线上.

The machining includes drilling hole, machining inner conic hole, boring and trimming for smooth connection.

第二、机械加工:打孔及加工内锥孔,再用专用模 、 夹具钻孔, 镗孔成型,然后修整外形至光滑连接.

Snapshots of Health conical roof, flowers white.

圆锥形花絮顶生, 花白色.

To develop conical cavities during solidification.

形成缩管凝固时形成缩孔.

The towers were topped with conical roofs.

这些塔的最上面是锥形顶.

Geometry: Inverse conical with 15 degrees slope.

几何: 逆坡与15degrees锥形.

The firework rocket has a cylindrical body and a conical head.

烟火火箭有一圆柱形壳体和一锥形头部.

A conical or heart-shaped green fruit with edible, sweet, white flesh.

一种圆锥形或心形绿色果实,可食用,果肉白色, 味甘甜.

Spring Processing: Compression springs, disc springs, toys spring, shaped spring, conical springs.

弹簧加工: 压缩弹簧 、 碟形弹簧 、 玩具弹簧 、 异型弹簧 、 锥形弹簧.

The conical configuration of the appendix makes obstruction of the lumen unlikely.

阑尾呈圆锥形,不易造成腔内梗阻.

Figure 3-10 illustrates the result of a study or conical shrouds.

图3-10表明了对锥形外壳的研究结果.

All three seemed sharp and conical in figure.

这三座山都呈尖尖的圆锥形.

Tire structure unsymmetry results in conicity and ply-steering, and has significant influence on tire mechanical behavior.

轮胎因其结构不对称性导致的胎体锥度及帘布层转向效应, 显著影响轮胎的力学特性.

It can be generally expressed that growth rate reduced, conidia decreased and minimized and pathogenicity weakened.

表现为生长速度减慢, 产孢数量减少,分生孢子变小,产毒能力下降以及致病力减弱.

Fig . 2 . Conidiophores and conidia Alternaria alternata produced on leaf spot of Basella rubra ( A, B ).

落葵叶斑病斑上的病原菌孢子梗及孢子 ( A, B ).

The potato dextrose liquor and indian jujube leaf liquor could promote conidia germination obviously.

马铃薯葡萄糖液和枣叶汁可显著促进分生孢子萌发.

Conidia were not produced on Richards medium and PCA medium.

在5种培养基中Richards培养基和PCA培养基不产孢.

A flask-shaped asexual structure containing conidia, found in certain fungi.

'分'.''生孢子''.'器'. ''含百分生饱子的瓶 状 无性生殖的结构, 发现于某种真菌中.

Conidia plays a very important role in the course of disease transmission.

分生孢子在稻瘟病菌的传播过程中起着非常重要的作用.

When relative humidity reached 100 % or in water, the percentage of conidial germination was highest.

分生孢子在饱和湿度或水滴中萌发率最高.