Normally it takes four weeks for hoppers to become adults, 一般说来 若虫需要 经过4周才能变成成虫
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
Eggs that have remained in the ground for 20 years begin to hatch. 在地下埋藏了20年的虫卵开始孵化
but they're just frequent enough to keep life ticking over. 但它们发生的次数 足以保证生命长盛不衰
A single shower can enable seeds that have lain dormant for 30 years or more to burst into life. 一场大雨使得在地下沉睡了30多年的 种子迸发出生命的活力
but these are the short moments that make it possible to live in deserts the year round. 但就是这些短暂的日子使它们 得以全年在沙漠中生活
more than enough to draw the oryx out of the dunes. 远远多于从沙丘返回的长角羚的需求
It's a rare chance for them to build up their food reserves. 这是它们仅有的积累食物储备的机会
they won't attempt to cross this field of sand dunes 它们不会试着爬过一座沙丘
The lions must wait for the oryx to leave the safety of the dunes, 狮子必须耐心等待 长角羚离开安全的沙丘