"London is always a couple of degrees higher in temperature than its suburbs," Chiang says, pointing to a research paper. If a map is marked off with isotherms, or lines of equal temperature, he says, they will circle urban areas in a pattern that meteorologists call a "heat island."
「英國倫敦市區就比其郊區高約攝氏兩度」，姜善鑫指著研究報告說，若用等溫線將都市與鄉村的溫度連起來，會形成和島嶼一樣的地圖，氣候、氣象學家將這種現象稱為「熱島效應」。