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Listen to part of a lecture in a meteorology class.
請聽氣象學課上的部分內(nèi)容。
Now, Earth’s atmosphere is sort of like a giant weather machine, right?
地球的大氣層有點像一個巨大的氣象儀器，對嗎？
Uh...with air and water being its key component, a machine powered by energy from the Sun.
一個以空氣和水為關(guān)鍵成分，靠太陽能提供動力的機器。
So we need to consider the role that air, or more specifically, wind, plays in this machine, so wind is really nothing more than moving air, right?
所以我們要考慮空氣的作用，或者更具體地來說，風在這臺機器中所起的作用，風只是運動著的空氣而已，對吧？
Now, as air is heated and becomes warmer, it expands, becomes less dense.
空氣受熱，溫度升高時會膨脹，密度變得更小一些。
When air in a particular area is heated, you get a concentration of warm air in an area of low pressure.
一個具體區(qū)域的空氣受熱時，暖空氣就會集中在一個低壓區(qū)域。
Likewise, when you get a concentration of cold air, that air’s gonna be very dense, so it’s gonna create an area of high pressure.
同樣的，當冷空氣匯集時，那片空氣的密度就會變得很大，所以就會創(chuàng)造出一片高壓區(qū)域。。
If you have an area of high pressure next to an area of low pressure, the colder, high pressure air will start moving toward the area of low pressure. Right?
如果在一個低壓區(qū)域旁邊有一個高壓區(qū)域，空氣越冷，越多的高壓空氣就會開始朝著低壓區(qū)域移動，對吧？
And the warmer air will move away, rising above the cooler air. Okay? Uh...yes. Linda?
而暖空氣便會離開，上升到冷空氣之上。Linda，請說？
So wind is actually generated by the Sun?
所以風實際上是由太陽產(chǎn)生的咯？
Well, Earth’s rotation plays a role, and there are other factors and we’ll come back to all that.
地球的循環(huán)也起了作用，而且還有其他因素，我們稍后都會講的。
