低头浅笑芯是如此的難受
[dī tóu qiăn xiào xīn shì rú cĭ de nán shòu]
Looking down with a smile hides the true discomfort within, perhaps illustrating the complex feelings such as shyness, awkwardness or suffering inside despite smiling on the outside; indicating the inner struggle masked by polite social behavior or pretense.