Across much of northern Australia, gamba grass from Africa is overrunning native savannah woodlands.
在澳大利亚北部的大部分地区，来自非洲的甘巴草正在侵占当地的大草原林地。
2
On the other hand, rainfall increased in the interior of western Africa, and the northern limit of the tsetse fly, an insect fatal to cattle, moved south.
另一方面，西非内陆的降雨量增加，采采蝇活动区域的北部边界向南移动——一种对牛致命的昆虫。
3
Cattle raising people in East Africa and northern Europe have gained a mutation that helps them digest milk as adults.