and contains several billion individuals. 共有数十亿只蝗虫
but soon, more than a billion swarm all over the forest. 马上,10亿只若虫爬满了整个森林
0ne and a half billion swarm across the savannahs of Africa. 以15亿的数量聚集在非洲的稀树大草原上
the steady roar of a billion beating locust wings will once again be replaced by nothing more than the sound of the desert wind. 无数蝗虫拍打翅膀时的喧哗将不复存在 再次取代它的只是沙漠中呼啸的风声
The Amazon transports a billion tonnes of sediment a year, 亚马逊河每年会带来10亿吨的泥沙
there were one and a half billion people on Earth. 地球上生活着15亿人
Now, over six billion crowd our fragile planet. 如今 已有超过60亿人拥挤在 我们这颗脆弱的星球上