conventional polite remarks or standard social etiquette

咱们是老朋友，就别用这些客套数了。

noun · the total number of items counted in sets, such as houses or suits of clothes

我们需要核实这栋楼的住房套数。

noun · a series of songs or a musical suite in traditional Chinese opera

这出戏由几个精美的套数串联而成。

noun · a series of tricks, set patterns, or a calculated routine used to achieve a goal

他的这些套数早就被人看穿了。