rocketry的精選

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用“rocketry”造句大全，rocketry造句

用“rocketry”造句大全，rocketry造句

2018-01-26
Theirresearchinrocketryblazedthewayforspacetravel.PhysicistRobertGoddard,rocketrypioneer,standsnexttooneofhisexperimentalA-seriesrocketsinfrontofhisworkshopinRoswell,NewMexico,inthe1930s.MrWhitehornan...