单词：high-subsonic aircraft
单词：high-subsonic aircraft 相关文章
EXPLORATIONS - High and Fast: the X-15 Reached the Edge of Space EXPLORATIONS -- a program in Special English by the Voice of America. Today, Doug Johnson and Frank Oliver tell about the first airplane that flew out of the Earth's atmosphere. It was
2012年VOA慢速英语(十)月
In 1940, North American Aviation designed the legendary P-51 Mustang in response to the British need for a high-performance fighter aircraft. The Mustang featured the most advanced laminar flow wing and a ducted cooling radiator positioned under the
国家地理2007年
Dubai officials say they plan to use Chinese-made drones to launch a self-flying air taxi as soon as July. 迪拜官员称他们计划引进中国制造的无人机，在七月推出自动飞行的空中出租车。 The Chinese-made EHang 184 drone h
2017年VOA慢速英语(二)月
Two pilots recently set a new altitude world record for gliders. A glider is an aircraft that does not have an engine. They are pulled into the air by powered airplanes and then released. They are designed to ride warm, rising air to gain altitude. T
2017年VOA慢速英语(九)月
AS IT IS 2016-05-22 Storm-Chasing Drones Help Fight Extreme Weather 使用无人机追踪风暴 对抗极端天气 Some countries are using drone technology to prepare for major weather events and observe severe storms as they happen. One place where
2016年VOA慢速英语(五)月