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。
应用推荐