二人团结一心,其锐利可以切断金属。语本《易经・系辞上》:“二人同心,其利断金。”后比喻同心协力,坚定不移。《晋书・卷六・明帝纪》:“敬听顾命,任托付之重,同心断金,以谋王室。”
英语 If two persons are of the same mind, their combined determination will overcome all obstacles.