“乱跑”的英语可以翻译为：un about，cut about ...

孩子们在周围乱跑，让所有人都很烦。The children were running about under everybody's feet.我们能听见老鼠在墙里乱跑.We could hear the mice scurrying about in the walls.空袭警报期间不可到处乱跑.One should not run about aimlessly during an alert....