The first to be fully tested in 2003 was the KT-1, a four-stage rocket based on the DF-21 MRBM (Medium Range Ballistic Missile).是什么意思_The first to be fully tested in 2003 was the KT-1, a four-stage rocket based on the DF-21 MRBM (Medium Range Ballistic Missile).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句