枯叶蝶失去了保护色
[kū yè dié shī qù le băo hù sè]
The meaning lies in losing protection due to changes or circumstances ('枯叶蝶'- dead leaf butterfly, usually use camouflage against danger or predator). If we compare our lives to nature, when one loses protective cover or adaptability in life, he will be more likely to be caught in a vulnerable situation