方向杆

And the induced normal curvature along the normal of contact line between the worm and the planet is obtained. The algebraic expression of the induced normal curvature at the top point of the ball-tooth is given.

另外，对行星轮与环面蜗杆沿接触线法线方向的诱导法曲率进行了求解和分析，给出了诱导法曲率在球齿齿面顶点时的代数式显式表达。

When a shutter button is depressed, a lever is rotated in counterclockwise direction, so the electrical contact assembly is also rotated.

当按下一个开关按钮时，一个杆逆时针方向旋转，使得电接触组件也旋转。

Carry out and control some, among them the design of the decelerator

杆修形的效果，而且瞬时接触线和相对运动速度方向夹角稳定，接近90度；蜗轮齿

Now there have been a certain number of works on the research for thekinematic synthesis of spatial RSSR mechanism for causing the driving and driven linkscorresponding angle displacement such as the direction cosine matrix method and rotationvector method.

目前已有若于著作研究了实现主从动杆对应角位移的空间RSSR机构的运动综合问题，如方向余弦矩阵法［1］、回转向量法［2］。

MAIN OUTCOME MEASURES: 3-D transference of expansion board and whole stabilization of distractor were observed in the process of distraction osteogenesis.

主要观察指标：在牵张杆的作用下，牵张板在三维方向移动以及牵张器整体稳定情况。

The direction of movement of this ejector pin is, therefore, controlled by this hole.

因此顶杆的运动方向由这个孔来控制。

Put your head close to the cue,so that you can see the exeat direction that you will hit the ball in.

把你的头靠近球杆，这样你就能看到你要击打的球的准确方向。

One would approach at first warily through the shrub oaks, running over the snow-crust by fits and starts like a leaf blown by the wind, now a few paces this way, with wonderful speed and waste of energy, making inconceivable haste with his "trotters," as if it were for a wager,and now as many paces that way, but never getting on more than half a rod at a time; and then suddenly pausing with a ludicrous expression and a gratuitous somerset, as if all the eyes in the universe were eyed on him —— for all the motions of a squirrel, even in the most solitary recesses of the forest, imply spectators as much as those of a dancing girl —— wasting more time in delay and circumspection than would have sufficed to walk the whole distance—— I never saw one walk —— and then suddenly, before you could say Jack Robinson, he would be in the top of a young pitch pine, winding up his clock and chiding all imaginary spectators, soliloquizing and talking to all the universe at the same time —— for no reason that I could ever detect, or he himself was aware of, I suspect.

有一只赤松鼠开始谨慎地穿过矮橡树丛，跑跑停停地在雪地奔驰，像一张叶子给风的溜溜地吹了过来；一忽儿它向这个方向跑了几步，速度惊人，精力也消耗得过了份，它用&跑步&的姿态急跑，快得不可想象，似乎它是来作孤注一掷的，一忽儿它向那个方向也跑那么几步，但每一次总不超出半杆之遥；于是突然间做了一个滑稽的表情停了步，无缘无故地翻一个觔斗，仿佛全宇宙的眼睛都在看着它，——因为一只松鼠的行动，即使在森林最深最寂寞的地方，也好像舞女一样，似乎总是有观众在场的，——它在拖宕，兜圈子中，浪费了更多的时间，如果直线进行，早毕全程，——我却从没有看见过一只松鼠能泰然步行过，——然后，突然，刹那之间，它已经在一个小苍松的顶上，开足了它的发条，责骂一切假想中的观众，又像是在独白，同时又像是在向全宇宙说话，一我丝毫猜不出这是什么理由，我想，它自己也未必说得出理由来。

The bar directions are conveniently specified by direction cosines.

杆的方向通常用方向余弦来表示。

The shear stress at some point and along arbitrary direction of the wringed pole just equals to the slope at the counterpoint and along perpendicular direction of the membrane.

扭杆横截面上某一点处的，沿任意方向的剪应力，就等于该薄膜在对应点处的，沿垂直方向的斜率。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。