夏天已經到了一段時間, 天氣越來越熱. 加上沒有半點雲的天空, 熱上加熱. 路上行人不多, 不是必要的話, 都不會停留在街上. 這炎夏, 和溫室效應有關嗎?Summer has came for some day and the temperature is getting higher and higher. Furthermore, the clear sky makes it even hotter. There are only few people on the street. No one want to stay on the street for no reasons. Is this hot summer related to the green house effect?
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