The rules of the competition were toughened up this year, with a time limit introduced.

泥浆泳的比赛规则今年更加严格，加入了时间的限制。

youdao

The rules of the competition were toughened up this year, with a time limit introduced.

泥浆泳的比赛规则今年更加严格，加入了时间的限制。

youdao