An eyewitness who owns a shop inside the market also told reporters that he heard a loud explosion, with a ball of fire and clouds of smoke in its aftermath.

VOA: standard.2009.06.01

So 1.1 times 10 to the -31 meters is not, in fact, a significant number when we're comparing it, for example, to the length of a ball, or the size of the baseball field.

所以1，1乘以10的负31次方米，事实上并不是一个很重要的数字，举例来说，当它与一个球的长度，或者一块棒球场地对比时。

麻省理工公开课 - 化学原理课程节选

The rate and pace of change in the industry is such that it's always kind of a jump ball environment where companies are not able to hang on to a great position for a super long time.

这一行变化的速度,就是这样,总处于一种跳球环境中,公司不能,永远处于不败之地。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

The U.S.sealed the victory in the 72nd minute through Clint Dempsey, who pounced on a loose ball in front of the Spanish net and deposited it in the goal to double the American lead.

VOA: standard.2009.06.24