But in summer, when conditions are much hotter than the average body temperature of 37 degrees, fewer than a quarter yawned.
但是在夏天，当环境温度远高于人体平均温度37度时，看同样图片而产生打呵欠反应的人还不到四分之一。
The average daytime summer temperature at sea level is 85 degrees F. (29.4 C) while the average daytime winter temperature is 78 degrees (25.6 C).
夏季白天的平均温度为华氏85度(29.4摄氏度)，而冬季白天的平均温度为华氏78度(25.6摄氏度)。
The average summer temperature at McMurdo Station, the American research base on Ross Island, has inched up 2.7 degrees Fahrenheit in the past 30 years, records show, more than the global average.
麦克默多站（McMurdo Station）是位于罗斯岛（Ross Island）美国研究基地，研究记录显示，在过去的三十年间，这里的夏季平均气温上升了摄氏1.5度，超出了全球平均升温幅度。
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