The ball mill′s rotational speed can only affect the impact force and frequency and has no influence on its separation point between balls and mill wall.

高能球磨机的转速不会影响磨球与磨筒壁的脱离点，只会影响磨球对粉体的撞击力及撞击频率。

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The Compositions, structures and properties of medium manganese S. G. iron grinding balls were investigated under conditions of laboratory.

在实验室条件下对中锰球铁磨球的成分、 组织和性能进行了试验研究；

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Bowling balls have advanced immensely over the past decade alone. Before the 1990's, the only types of bowling balls available were urethane, plastic, and rubber.

保龄球在过去的10年间有了巨大的进步，1990年以前，球的材质仅限于优力胶、玻利及橡胶。

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It fires balls that burst and release a chili solution when they hit the elephant's skin.

VOA: special.2010.07.27

But in our case, the probability of backscattering is going to be the number of balls that backscatter, and that's going to be divided by the total number of ping-pong balls.

用20除以132000，但现在背散射,的概率是被散射回来的小球，除以总的小球数,你们记得。

麻省理工公开课 - 化学原理课程节选

In the U.S., some toys,like small rubber balls, must carry warning labels.

VOA: standard.2010.02.23

The names for Titleist's balls come out of the research.

WSJ: A Plea for More Poetry on Golf Balls | Golf Journal by John Paul Newport

Contrast that to four years ago, when the inaugural ceremony included Aretha Franklin but also classical musicians such as cellist Yo-Yo Ma, violinist Itzhak Perlman and others, and the Hollywood types were largely saved for the evening's balls.

NPR: The Inaugural Do-Over: Chomping Gum, Savoring View

However, Labour's Mr Balls told the Andrew Marr Show that the chancellor's "judgement has been proved to be woefully lacking".

BBC: George Osborne: Deficit cut is taking longer than planned