noun 下载 🔗分享 焦耳 In the International System of Units, the derived unit of energy, work and heat; the work required to exert a force of one newton for a distance of one metre. Also equal to the energy of one watt of power for a duration of one second. Symbol: J Examples : "Example Sentence: "It takes about one joule of energy to lift a small apple one meter." " 大约需要一焦耳的能量才能把一个小苹果举高一米。 energy physics science unit technical work 与AI对话词汇游戏阅读练习