joule's law of electric heating英 [dʒuːlz lɔː ɒv ɪˈlektrɪk ˈhiːtɪŋ]美 [dʒulz lɔː əv ɪˈlektrɪk ˈhiːtɪŋ]一电热的焦耳定律电力
