查询词典 ball-pointpen

ONE OF THE MOST IMPORTANT THINGS FOR PLAYING TENNIS BALL IS STARE AT THE BALL.

打网球最重要的一点就是紧盯着球。

When you throw a ball up into the air as fast as you can, the ball reaches a point where it seems to pause for a moment, and then it comes down.

当你把一个球尽可能快的抛入空中的时候，这个球到达一个点它会停一下，然后落下来。

After the ball has been dead,it is put into play by a jump ball,throw-in or free throw attempt.

发球允许发在前场，也允许发在后场，并不等于没有前后场，这是我的理解

Ticky: So to be on the ball means to be able to react quickly to things. There's also another phrase:'to keep your eye on the ball'.

Eric：这个短语意思是在一个变化无常的环境下你必须要保持精神集中不走神儿。

Diagram 7E shows a ball in flight and how your eyes track the ball.

图7E展示了你的眼睛是怎样跟踪飞行中的来球的。

Another problem is that the ball suddenly changes direction – going from you towards the opponent and then back to you. This sudden change of direction makes it difficult to track the ball and you can "lose" it for a split second.

另一个问题是球突然改变了方向—球刚被你击向对手有立即回来了，方向的突然改变使跟踪球的飞行轨迹并得困难而你很可能在瞬间将其看"丢"了。

We discovered that the Ball was actually a transvestite Ball with not many gays in evidence.

我们发现，球实际上是一个异性球不是很多同性恋的证据。

While analyzing the crackie of the ball mill, in order to forecast the expansion speed of the crackle and the surplus life-span of the ball mill tube, some relevant theory of fracture mechanics was combined with finite element analysis for the first time, this is a better way with practical innovation.

在分析球磨机裂纹时，首次将有限元分析的结果与断裂力学中相关理论结合起来，对球磨机筒体进行了裂纹扩展速度预测和剩余寿命预测，具有一定的实用创新性。

In order to detect load in tumbling box correctly,the frequency band that could reflect information of mill ball load was obtained from the vibration signal collected from ball mill bearing block.The signal was analyzed by energy method based on wavelet transform,from which the frequency band signal was picked out to show the corresponding coal level in tumbling box.

为了更准确地检测料位，对球磨机轴承座振动加速度信号进行采集，从振动信号中提取了反映料位信息的特征频段，利用小波分析技术对信号进行了能量分析，分离出反映滚筒内存煤量信息的信号，为实现球磨机料位的自动控制提供了理论依据。

One straight line guide and silk pole flat network of transmission gush out black to make network device, by shower nozzle, shower nozzle shelf, air cylinder, person who lead sharply, base, job mesa and electrical machinery, pole of silk and pole of silk make up, its characterisitic is that: Both ends, with locating an air cylinder of bottom base of shower nozzle to be linked to through a connecting rod of the stated shower nozzle shelf, make up and lift the organization pneumatically; And this shower nozzle sets of base underpart set up first group along the longitudinal straight line guide package that arranged of the base again, two straight line guide package shower nozzle sets of base department of position set up and link with this shower nozzle of a bases, and can promote its ball silk pole moved along longitudinal time of the base; The end head of this ball silk pole is connecting the electrical machinery of urging.

一种直线导轨和丝杆传动的平网喷墨制网装置，由喷头、喷头架、气缸、直线导机、基座、工作台面及丝杆和丝杆电机组成，其特征在于：所述喷头架的两端通过一连杆与设于喷头架底座下部的气缸相连，组成气动抬升机构；而该喷头架底座下部又设置着一组沿基座纵向排布的直线导轨组件，两直线导轨组件中间部位的喷头架底座部设置与该喷头架底座相连，并能推动其沿基座纵向来回移动的滚珠丝杆；该滚珠丝杆的端头连接着驱动电机。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐