noun🔗Share发条，主发条。 The principal spring of a clockwork mechanism, which drives it by uncoiling."The old clock stopped working because the mainspring was broken. "这个老钟不走了，因为里面的主发条断了。machineparttechnicaldevicetimeChat with AIVocabulary GamePractice Reading
noun🔗Share主要原因，动机。 The most important reason for something (Cf. spring "origin of something" (literary) (often in the plural) the springs of her ambition)."My daughter is the mainspring of my life."女儿是我生命中最主要的原因和动力。businessattitudemindphilosophyChat with AIVocabulary GamePractice Reading
