milestone造句
Celebrateeverylittlemilestone.Thiswasanimportantmilestone.Theirdeparturewillbeamilestone.TheseresearchflightsmarkanimportantmilestoneforVirginGalactic.Theresearchmarksatechnicalmilestoneinthesynthesis...
Celebrateeverylittlemilestone.Thiswasanimportantmilestone.Theirdeparturewillbeamilestone.TheseresearchflightsmarkanimportantmilestoneforVirginGalactic.Theresearchmarksatechnicalmilestoneinthesynthesis...