Listening practice: The city that stays hot after sunset
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本期内容
为什么太阳落山后，城市还没有立刻凉下来？本期英语听力围绕城市热岛效应展开：道路、屋顶和高楼怎样储存热量，树木、水面和绿化屋顶怎样帮助降温，以及科学家如何把卫星观测和地面传感器结合起来，找出同一座城市里不同社区的温度差异。
节目先提供一遍完整英文叙述，接着用中文解释主线、关键词和长句，最后完整重播英文原文，适合先盲听，再带着词汇复听。
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