You fence the perimeter to keep out cows and people.

你用篱笆把四周围起来，把牛和人们都隔在外面。

youdao

You fence the perimeter to keep out cows and people. Then you walk away.

你用篱笆把四周围起来，把牛和人们都隔在外面。

youdao

Now, they can keep their efforts on shoring up the perimeter.

现在，他们可以把全部精力都放在外线。

youdao

Now, they can keep their efforts on shoring up the perimeter.

现在，他们可以把全部精力都放在外线。

youdao