Not so: historical records show that malaria has previously been widespread in temperate regions - as far north as Scandinavia - and survived even during the coldest years of the Little Ice Age.
并非如此:历史纪录表明,疟疾此前已经在温带地区广泛分布——最北到了斯堪的纳维亚地区——并且甚至在小冰期的最冷的年份存活了下来。
There are also a number of old genera in the tropics, indicating that tropical extinction rates are lower than in temperate regions. So the tropics are also a museum of diversity.
无疑热带地区真的是生物进化的温床,还有,在热带地区存留着一定数量的老物种,这就说明了热带地区物种的死亡率比温带地区要低,所以热带地区还是存有多样物种的大型博物馆。
Since 1970 or so, the average temperate in the U.S. in January increased by 5 degrees Fahrenheit.
自1970前后以来,美国1月的平均气温上升了华氏5度。
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