权威例句
Crewless gliderCrewless gliderCrewless in spaceCrewless Craft on Steady CourseCrewless Ghost Ships of the Interwar NavySystem of crewless small-tonnage ships' group controlUnderwriters get ready for crewless ships0203 Maneuvering performance of a crewless GPS solar boat111 Autonomous navigation systems for a crewless GPS solar boatLow-altitude images application from Crewless Air Vehicles for quick geoinformation updating
