Gullies, streaks, ripples and dust devil tracks on Russell Crater Dunes.沟壑, 条纹, 波纹和沙尘暴,罗素环形山沙丘轨道.Near the end of the movie, the base of the dust devil becomes much wider.在影片的结束部分, 旋风的基部变得很宽.The dust devil column is clear...
Chamber compatibility and injector durability involve the control of the combustion environment.室相容性和喷注器耐久性包括对燃烧环境的控制.Some stratification exists in the spray produced by any liquid propellant injector.由任何液体推进剂喷注器所产生的喷雾都存...
Ethiopia has almost the lowest oil consumption per capita in the world.埃塞俄比亚的人均石油耗费量几乎是全世界最低的。They have the world's largest per capita income.他们的人均收入居世界之首。Per capita income rose sharply last year.去年人均收入猛增。...