笑不出海绵宝宝的微笑哭不出蜡笔小新的悲伤
[xiào bù chū hăi mián băo băo de wēi xiào kū bù chū là bĭ xiăo xīn de bēi shāng]
'Can't laugh with SpongeBob's smile or cry with Crayon Shin-chan's sorrow.' Both mentioned characters come from very popular cartoon animations. SpongeBob always appears happy while Crayon Shin-chan conveys a bit of innocence mixed with mischief. This sentence conveys a sentiment that the author feels numbness, maybe due to some heavy pressure or complicated inner state that makes them unable to easily experience basic joy and sadness like a cartoon figure.