发条 發條

    fātiáo

    1. Nounclockwork spring (used to power a watch or windup toy etc); windup; clockwork (attributive)

    这个玩具熊由发条驱动,上紧了就会自己走路。Zhège wánjù xióng yóu fātiáo qūdòng, shàng jǐn le jiù huì zìjǐ zǒulù.This toy bear is clockwork and will walk on its own when wound up.