They let their kids run riot.

他们听任自己的孩子撒野。

She dressed strictly for comfort and economy, but let her imagination run riot with costume jewellery.

她穿衣服严格地追求舒适和经济，但是在佩戴时装首饰方面则让其想像力肆意发挥。

The weeds run riot in some fields.

有些田地里出现了草荒。

They could just run riot in the front.

他们可以在前场尽情奔跑。

Weeds and pests run riot among plants in my garden.

我的花园里，树木间虫子和杂草丛生。