idiom · having common interests or being obliged to work together towards common goals

这两家企业在技术研发上决定同舟共济，共同应对市场竞争。

idiom · cross a river in the same boat; to help each other in times of danger or difficulty

面对这场突如其来的自然灾害，全国人民同舟共济，共渡难关。