A space experiment to test these hypotheses may be conducted later this decade, according to Ginet, but any operational ground or satellite system is years beyond that.是什么意思_A space experiment to test these hypotheses may be conducted later this decade, according to Ginet, but any operational ground or satellite system is years beyond that.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句