If a 10 km/h tail wind exists, flying speed will be 30 km/h as measured by an airspeed indicator, while groundspeed will be 30+10 = 40 km/h .是什么意思_If a 10 km/h tail wind exists, flying speed will be 30 km/h as measured by an airspeed indicator, while groundspeed will be 30+10 = 40 km/h .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句