For example, ancient people discovered that drops of water and certain gemstones distorted light in a predictable way.
例如，古人观察到了水滴和某些雕琢过的宝石可以把光按照一定的方向折射出去。
On its way down, it encounters millions more drops of water. The ice crystal gets bigger as the droplets in the cloud give their water to it.
在下落过程中，冰晶同时也会和上千万的水滴接触，后者的水分会使晶体体积越发增大。
Solution: The gentlest way to clean and brighten all kinds of jewelry is to scrub with a soft toothbrush dipped in warm water that's been spiked with a few drops of dishwashing liquid.
处理方法：最温和的清洗方法就是，在温水中滴入几滴洗洁精，然后用牙刷蘸着温水慢慢刷洗首饰。这样首饰就变得光亮清洁。
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