enclosure

农场主建了一个围栏来放牧他的牛群。

The farmer built an ___enclosure for grazing his cattle.

动物园里的狮子都被关在有围栏的区域内。

The lions in the zoo are all kept within a secure ___enclosure.

孩子们在围栏内的游乐场玩耍。

The children are playing in the ___enclosure of the playground.