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.
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。
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.
不顾一切的人们已尝试过各种办法，从向空中发射炮弹催雨到云团中喷射碘化银。现在研究者们试着用激光催雨。
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).
实验发现，碘化银产生播撒效果的临界温度比干冰略低（碘化银为-5℃到-10℃，而干冰为-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.
NEWYORKER: The Climate Fixers
These pellets, usually made of silver iodide, salts or calcium chloride, are physically dropped via plane or shot into the air via rockets.
FORBES: Venezuela: Recent Rain And Claims of Cloud Seeding
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.
ECONOMIST: But it pours awards on the weather-fixers

a yellow insoluble powder that darkens on exposure to light: used in photography and artificial rainmaking. Formula: AgI