At other times the cow wandered around the 526-acre park and the artificial grass field normally used for human sporting events.

其他时候，母牛便在 526 英亩的公园里瞎转悠，而公园里的人造草坪只适用于人类的体育活动。

The third solution, creating an artificial magnetic field, won't work very well either.

第三种解决方案， 创造一个人造磁场， 也不会很有效。