He let/set the dogs loose in the courtyard.他让狗在院子里撒欢。

cattle let loose to graze on the green fields在草地上自由地吃草的牛

It's the end of the school year, when schools turn students loose on our towns.学年结束，学校放假期间学生们在我们各个镇上随意活动。

a director who's willing to let her actors loose to interpret their roles however they see fit愿意让她的演员们按自己认为适合的方式诠释角色的导演

We must find ways to stop the violence that has been let loose [=loosed] on the city.如何制止城市中肆虐的暴力活动

The crowd let loose [=let out] an enormous groan when the pass was intercepted.传球被拦截时人群中发出了巨大的叹息声。

She let loose (with) a scream.她突然发出一声尖叫。