云是由海洋中的水分被太阳加热蒸发而形成的，这些水分上升到大气中，凝结成微小的水滴，附着于微小的尘埃颗粒。
Clouds are formed from the evaporation of the oceans' water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.
以微小的方式开始，帮助别人，做微小的好事，看看那些事情有什么影响。
Start in small ways - help others, do little good things, and see what the impact of those things are.
一个可能的解释，宇宙是微小的——它是如此微小，以致如果回到微波背景刚刚产生时，它不可能容纳大的泡泡。
One possible explanation is that the universe is small - so small that, back when the microwave background was being produced, it just could not hold those big blobs.
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