上叉

Parts the first part of the two forks, there are two holes for the installation of needle bearings and connected with the cross-axis, since the role of universal coupling.

零件的两个叉头部位上有两个孔，用以安装滚针轴承并与十字轴相连，起万向联轴节的作用。

During the movement of the regulation annulus, it turns whirligig of the regulations arm into whirligig of the spindle, and change the whirling direction.

调整环在运动过程中把压力臂上拨叉的旋转运动转化为转轴的旋转运动，改变了旋转运动的方向。

Double wishbone suspension features turnbuckles on the rear upper arms that are easily adjusted.

双叉骨悬架特点turnbuckles对后方上的武器很容易调整。

A fungus, usually of the class Ascomycetes, that grows symbiotically with algae, resulting in a composite organism that characteristically forms a crustlike or branching growth on rocks or tree trunks.

地衣一种真菌类植物，通常属于子囊菌纲，与藻共生形成一种复合有机体，生长于岩石或树干上，多为硬壳状或枝叉状

However, few studies have investigated the consequences of induced plant response due to previous insect attack on phloem-feeding insects. Herein we address whether the feeding behaviour and growth of a phloem-feeding insect are affected by host plant changes with scientific research methods using three varieties resistant wheat 98-10-30, Amigo and Batis, which are from three different countries.

本研究通过严谨的实验方法，即选定3个不同国家的小麦抗性品种98-10-30、Amigo和Batis，在所有条件严格统一的人工智能控制温室内，通过各处理在同一植株上先后不同的接蚜方式，分别测定了麦二叉蚜Schizaphis graminum和麦长管蚜Sitobion avenae Fab。

The liquid density sensors presented in this project are dependent on the Surface Acoustic Wave technics in the fabrication process. Considering the maturity of SAW technics and the easiness of high frequency BAW generation with the IDTs, it is convenient for sensors miniaturization.

本项研究工作提出的微量液体密度传感器在制作上仅需采用成熟的声表面波工艺即可，实现起来比较容易，叉指换能器容易激发较高频率的体声波，便于传感器小型化。

The cloned Buchnera groEL genes of Schizaphis graminum and Rhopalosiphum maize were ligated into pBV221,pET30a and pTrcHisA expression vector for construction of pBVRM,pBVSG, pETRM,pETSGPR,pTrcRM and pTrcSG. They were transformated into E. coli BL21(DE3),DH5a and JM109 for studying their expression.

2将克隆的玉米蚜和麦二叉蚜Buchnera groEL基因连接到原核表达载体pBV221、pET30a和pTrcHisA上，构建了含2个目的基因的6个表达原核表达载体：pBVRM、pBVSG，pETRM、pETSG和pTrcRM、pTrcSG。

Just when she had her legs crotched over my legs, I opened my eyes to find her face about six inches away from my face. This startled both her and I.

当她把腿叉在我的腿上时，我睁开眼睛看见了她近在咫尺的脸，我和她都吓了一大跳。

Since hydropneumatic elements and spring constraints are usually included in mechanisms in practice, and also with the development of high-speed and high-precision mechanisms, friction can no longer be neglected.

又P'0(2)其中h；为转向速度多边形上极点夕至力P；的距离(图1)。式(2)中写成叉积形式表示取矩时有顺、逆时针的转向之别。下面再看三个例子图2、图3、图匀。

Upright stems bear sparse emergences and divide pseudomonopodially with the isotomous lateral branches.

具有根状茎，气生茎上着生有稀疏的刺状突起，假单轴分枝，侧枝等二叉分枝。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷