rocketry造句
Theirresearchinrocketryblazedthewayforspacetravel.PhysicistRobertGoddard,rocketrypioneer,standsnexttooneofhisexperimentalA-seriesrocketsinfrontofhisworkshopinRoswell,NewMexico,inthe1930s.MrWhitehornan...
Theirresearchinrocketryblazedthewayforspacetravel.PhysicistRobertGoddard,rocketrypioneer,standsnexttooneofhisexperimentalA-seriesrocketsinfrontofhisworkshopinRoswell,NewMexico,inthe1930s.MrWhitehornan...