Over a period of about 100,000 years, while the seas pulled back, climates around the world became dramatically more extreme: warmer days, cooler nights; hotter summers, colder winters.
在大约10万年的时间里，当海水退去，世界各地的气候变得更加极端：白天更暖和，夜晚更凉爽；夏天更热，冬天更冷。
Fewer animals will die during warmers winters, but greater Numbers will die during hotter summers.
冬天越温暖，动物的死亡量就会越少，但是夏天越热，动物的死亡量就会增加。
Their insulated fur and lack of sweat glands allow them to survive harsh winters, but those adaptations also make longer, hotter summers very difficult to endure.
它们有保温的皮毛，并且缺乏汗腺，这使它们能够在冬天的严寒中生存，但也使更长、更炎热的夏天变得难以忍受。
Mister Stephenson says summers are becoming longer and hotter in the western United States. This makes trees weaker and decreases their ability to survive insect attacks and forest fires.
斯蒂芬森先生称，现在美国西部的夏季变得更长了，天气变得更热了。这使得树木的生命更脆弱，削弱了树木逃脱虫害和火灾的能力。
It is colder in winter and the summers are hotter than they used to be.
冬天变得更冷，夏天也比以前更难熬了。
It is colder in winter and the summers are hotter than they used to be.
冬天变得更冷，夏天也比以前更难熬了。
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