(d) 太空中的火焰 液体和金属 液体 火焰 金属溶液及其他材料将是空间站基础研究的课题 在没有重力的情况下 连火焰的燃烧都是异样的 失重会减弱对流而在地球上对流使热空气或液体上升 使冷空气或液体下降 在没有对流的情况下轨道上火焰的形状发生变化 便于进行在地球上无法做到的燃烧过程研究 即燃烧学的这一研究领域 轨道上没有对流 金属溶液或其他材料的融合比在地球上更彻底
(d) Flames, fluids and metal in space: Fluids, flames, molten metal and other materials will be the subject of basic research on the Space Station. Even flames burn differently without gravity. Reduced gravity reduces convection currents, the currents that cause warm air or fluid to rise and cool air or fluid to sink on Earth. This absence of convection alters the flame shape in orbit and allows studies of the combustion process that are impossible on Earth, a research field called Combustion Science. The absence of 1 Report of the Third United Nations Conference on the Exploration and Peaceful Uses of Outer Space, Vienna, 19-30 July 1999 (United Nations publication, Sales No. E.00.I.3). convection allows molten metals or other materials to be mixed more thoroughly in orbit than on Earth;