单词	墾荒者
释义	墾荒者1. pioneer
随便看	directional dose equivalent directional drilling directional earth-leakage relay directional effect directional element directional emissivity directional emissivity [of a thermal radiator directional emissivity [of a thermal radiator, in a given direction] directional emissivity ( of thermal radiator directional emissivity ( of thermal radiator, in a given direction) directional emissivity [ of thermal radiator, in a given direction] directional emitter directional exposure directional exposure--shield directional factor directional filter directional focusing directional force directional freezing directional frictional effect directional function directional gain directional ground relay directional gyro directional gyro compass