and

4265 篇文章
to form gigantic plagues several billions strong and as much as 40 miles wide.
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to form gigantic plagues several billions strong and as much as 40 miles wide. 从而形成巨大的灾害 无数“瘟神”组成的大军绵延长达40英里

places where wind meets rain and vegetation starts to grow.
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places where wind meets rain and vegetation starts to grow. 那里正是风雨交加的地方 植物定能生长

And when groups merge,
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And when groups merge, 蝗群合并之后

and a whole swarm can consume literally hundreds of tonnes of vegetation.
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and a whole swarm can consume literally hundreds of tonnes of vegetation. 而整团蝗虫云能消耗掉数百吨植物

There is no other species on the planet that responds as quickly and as dramatically to the good times as the desert locust.
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There is no other species on the planet that responds as quickly and as dramatically to the good times as the desert locust. 好日子到来时 地球上没有其它物种 能像沙漠蝗那样迅速而又戏剧性地作出反应

and when it happens they must make the most of it.
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and when it happens they must make the most of it. 一旦发生 它们必须尽可能地利用它

And there hasn't been a bloom like this one for a century.
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And there hasn't been a bloom like this one for a century. 这里已有一个世纪 没有像现在这样开满鲜花

The good times for lions and oryx are brief,
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The good times for lions and oryx are brief, 狮子和长角羚的美好时光十分短暂

and called that because the water may run for just a single day.
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and called that because the water may run for just a single day. 之所以这么叫是因为 这些水可能仅仅流淌一天左右

which have more nutrition and moisture than the stems.
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which have more nutrition and moisture than the stems. 因为草根中的营养和水分比茎干多得多