turn someone/something loose idiom
释放，放掉；放手，听凭，放纵
to free someone or something; to remove anything that limits the freedom of action of someone or something
He turned the horse loose in the field. 他把马散放在田野上。
The slaves were turned loose to make their own way in life. 奴隶们被释放了，让他们自己谋生。