idiom · A situation or conflict requires the participation of more than one party; it takes two to tango.

俗话说孤掌难鸣，这场纠纷你们两个都有责任。

idiom · It is hard to clap with only one hand; it is difficult to achieve anything without support or cooperation.

他在公司里孤立无援，孤掌难鸣，无法推行改革方案。