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。
In this route, the overall cost is low and the reaction condition is temperate, so it is suitable for the industrial production.
该路线原料廉价易得，成本较低，反应条件温和，适用于工业生产。
In this route, the overall cost is low and the reaction condition is temperate, so it is suitable for the industrial production.
该路线原料廉价易得，成本较低，反应条件温和，适用于工业生产。
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