单词	双重分级
释义	双重分级double grading
随便看	navigation; fixed-lead navigation flame-float navigation, guidance and control navigation, guidance and control {=ngc} navigation head navigation; inertial navigation instrument navigation interface navigation; interplanetary navigation-- interstellar navigation; interstellar navigation keys navigation lamp navigation law navigation laws navigation light navigation light indicator navigation light [of a vessel] navigation lights navigation lights board navigation lights sentinel navigation link navigation lock navigation management navigation map