He made Robinson promise that he would never show his anger on the baseball field.

VOA: special.2009.04.05

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

In nineteen thirty-four it was still rare to have lighting in a baseball field.

VOA: special.2009.03.23

But among thousands of people and performers who gathered at the Steel Yard baseball field in downtown Gary to celebrate Jackson's life were people who remembered the Jacksons before their fame and fortune.

VOA: standard.2009.07.11