1·For decades, MayDay parades in Moscow have taken place under clear blue skies, aircraft having deposited dry ice, silver iodide and cement powder to disperse clouds.
几十年来，莫斯科的五月节游行都是在晴朗的蓝天下举行的，他们飞机上撒下干冰、碘化银和水泥粉来驱散云层。
2·The chemicals fired into the sky, usually dry ice or silver iodide, are supposed to provide a surface for water vapour to form liquid rain.
发射上天的化学物通常是干冰或碘化银，它们应该能为水蒸汽提供一个表面以凝结成雨滴。
3·The results showed that, with silver iodide solution revealed the increasing concentration of pulp a very good antimicrobial effects close to 100%.
结果发现，随着碘化银大白浆溶液浓度的增加有很好的抗菌性，效果接近于100%。
4·It was a compound called silver iodide.
那是一种叫做碘化银的化合物。