同甘共苦 甘：甜。共同享受幸福，共同擔(dān)當(dāng)艱苦。
共同承擔(dān)危險(xiǎn)和困難。指彼此關(guān)系密切，利害一致。
[go through thick and thin together;share each other's hardships] 共同擔(dān)當(dāng)災(zāi)禍和困難
