it was such fun to watch it run loose in the park.这里怎么会用loos

loose 在这里是形容词,running loose 一般指宠物被解掉了牵绳而自己乱跑。这句话可以翻成看着它在公园里撒了欢的跑太有意思了。run loose 也可以用作：A tiger escaped from the zoo last night and has been running loose on the streets。一只老虎昨天从动物园跑了出来,一直在街上乱跑。