mindexmegajoule./meg-uh-joul, -jool/US // ˈmɛg əˌdʒaʊl, -ˌdʒul //兆焦耳,百万焦耳,百兆焦耳Definitionsn.noun · 名词1. Physics.›a unit of work or energy, equal to one million joules. Level 5More words in m →