external Q外Q值externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external margin国外经济盈余external jumper外接跳线external beauty外在美external switch外部开关external values外在价值external species外来物种external forcing外强迫external culture体外培养External hormone外源激素external product外积