yǒu yuányīn de qǐngqiú bǐ dānchún shuō nǐ xiǎoshēng diǎn gèng róngyì bèi jiēshòu

有原因的请求，比单纯说“你小声点”更容易被接受。

A request with a reason is more easily accepted than simply saying "be quiet."