Clouds are sometimes seeded with silver iodide to induce precipitation.人们有时在云里播撒碘化银,以诱使降雨.The migration of iodide ion between layers is controlled by barrier interlayers.碘离子在层间的扩散作用可以用隔层加以控制.Gas may play an important par...
Every time we talk about the hard pioneering days, we have so much to say that we can't get it all out.大家一提起那艰苦创业的日子, 总有说不完的话.The school has won awards for its pioneering work with the community...这所学校因其针对该社区具有开创性的工...