But on most tropical plains across our planet, the wet season is followed by a dry one. 然而地球上的绝大多数热带草原 在经历雨季后总是要经历旱季的
It's also exceptionally dry for one very big reason, 而且这里又干燥异常,那是因为一个很大的原因
Sometimes one mouth simply isn't enough. 有时候 一张嘴根本就不够
There are no bushes, no trees. There's only one thing to hide behind. 这里没有矮小的灌木 也没高大的乔木 只有一样东西可以藏身其后
Two million are thought to live here, but no one really knows. 共约两百万只瞪羚生活在此处 但具体数量仍不得知
one of the planet's great migrations is underway. 地球上规模最大的迁徙大军正浩浩荡荡地行进着
extends one third of the way around our planet. 便横跨了地球的三分之一