1. 航空器：air corridor 空中走廊 | air craft 航空器 | air craftsman 空军士兵
2. 航空器, 飞机：air cover || 空中掩护 | air craft || 航空器, 飞机 | air craftsman || 空军士兵
1. She said federal investigators did not know the altitude of the two craft, information it hoped to verify with air traffic control on Sunday.
2. The Air Force has not said whether it carried anything in its cargo bay, but insists the primary purpose of the mission was to test the craft itself.
3. The winged craft autonomously landed at Vandenberg Air Force Base on the California coast.