So, they said loudly to warn people that there actually is no real side-effect-free joy in this world and much bitterness and moil conceal behind joy, which we must be discreet to.

• 因此，他们大声疾呼地提醒世人，这世上其实没有所谓真正无副作用的快乐;快乐背后其实隐藏着相当程度的辛酸与苦役，不可不慎。