查询词典 tracking ball

The 28th international table tennis federation world after the modification of the rules , the ball from behind high ball down, so that can serve force is not legal service. In the 1960s, along with the development of tennis sport service quality is improved greatly, and pay more attention to the rotation speed, and serve the high toss service, but due to not to bring great threat returner and so on the new rules, not too many restrictions on serving technology.

第28届世乒赛后，国际"乒联"对规则进行了修改，规定了抛起的球从最高点下降时才能击球，因此认定合力发球是不合法发球。60年代随着乒乓球运动的发展，发球质量也有了很大的提高，更注重发球的旋转与速度，开始出现了高抛发球，但由于并没有给接球方带来很大的威胁，所以，规则并未对这些新的发球技术进行过多的限制。

The core of the ball has an effect on the ball path. The Rg is one of the primary properties of the core.

球心也会影响到球的行进路线， RG 值是球心最主要的特性。

Steel ball may be used instead of steel rod in the ball mill.

也可以将钢棒换为钢球作球磨机使用。

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I am still not brave enough and not confident enough to take the responsibility, such as calling for the ball or rucking the ball even though the Ruck is bleeding.

2，第一场比赛。爸说中国人在这身体对抗性的运动中肯定比不过人家，中国

The results showed that the initial rotating time of ball rotor was regulated by the flow of pseudofluids through an orifice of ball rotor so as to make the small caliber fuse attain required safety separation distance.

结果表明，通过球转子腔内准流体的泄流可以控制球转子的转正时间，进而使小口径引信获得预期的延期解除保险距离。

The utility model relates to a safety power saving lighting lamp for machine tool aperation, comprising a universal ball lamp socket (1), a laminated board(2), a universal ball (5), a flexible snake skin lampholder(6), electric wires (7)and(8), a lamp cap(13), a transformer B-[1], full-bridge rectifiers D-[1]～D-[4], a capacitor C-[1] and a trichromatic fluorescent lamp.

＃ 公用运算模式的一个方面涉及到安全省电照明灯机床aperation组成的一个普遍球灯插座（ 1 ），层压板（ 2 ），普遍的球（ 5 ），以及灵活的蛇皮灯座（ 6 ），电线（ 7 ），（ 8 ），一盏灯帽（ 13 ），变压器的B - [ 1 ] ，全桥整流器的D - [ 1 ] 个D - [ 4 ] ，是一个电容的C - 1 〕和三基色荧光灯。

If you Baoding iron ball very interested, you can contact us, we will you do in detail, iron ball Baoding Sambo as one of the characteristics of our Baoding, we, as people are willing to Baoding their own special products developed cities

如果您对保定的铁球十分感兴趣，可以与我们联系，我们将为你做详细的讲解，铁球作为保定三宝之一，是我们保定的特色，我们作为保定人很愿意将自己城市的特色产品发扬光大

A team mate may attempt to seal off the ball with his shoulder at chest height of the ball-carrier.

队友可能试图封堵皮球与他的肩膀，在胸部高度的球载体。

For next Sunday's experiment you will need the following special items: A piece of cardboard (about 30cm by 16cm), a sheet of construction paper (about 35cm by 50cm), sellotape, a straw, a ball bearing, bb gun bullet or other small ball that will fit inside the straw.

下周日的科学实验，你需要特别准备以下的东西︰一片硬纸板约三十公分长、十六公分宽，一张美工纸，约五十公分长、三十五公分宽，胶带、一根吸管、小铁球、BB枪子弹、或其它可塞入吸管里的小球。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。