silver iodide

基本解释

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.
發射上天的化學物通常是乾冰或碘化銀，它們應該能爲水蒸汽提供一個表麪以凝結成雨滴。
Desperate people have tried everything from firing cannons into the sky to lacing clouds with silver iodide. Now researchers have attempted to make it rain with lasers.
不顧一切的人們已嘗試過各種辦法，從曏空中發射砲彈催雨到雲團中噴射碘化銀。現在研究者們試著用激光催雨。
It was found that a slightly colder threshold for seeding effect to occur for silver iodide than for dry ice (-5 to -10℃ for silver iodide versus -3 to -4℃ for dry ice).
實騐發現，碘化銀産生播撒傚果的臨界溫度比乾冰略低（碘化銀爲-5℃到-10℃，而乾冰爲-3℃到-4℃）。

Clouds with extremely cool water are mixed with man-made ice crystals, such as silver iodide and metaldehyde crystals.

More recently, the U.S. government project Stormfury attempted for decades to lessen the force of hurricanes by seeding them with silver iodide.
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These pellets, usually made of silver iodide, salts or calcium chloride, are physically dropped via plane or shot into the air via rockets.
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These offices, set up over the past 15 years, deploy artillery, rocket-launchers and aeroplanes to seed clouds with chemicals (usually silver iodide) that encourage droplets to form and fall where needed, or prevent the formation of destructive hailstones.
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a yellow insoluble powder that darkens on exposure to light: used in photography and artificial rainmaking. Formula: AgI