- waiting for a meal to fall out of the sky.
等着食物从天而降 - When rivers finally reach the sea
当江河最终汇入大海时 - they slow down, release their sediment and build deltas.
水流减缓 留下大量泥沙 堆成了三角洲 - In Bangladesh the Ganges and Brahmaputra rivers join
在孟加拉国 恒河与雅鲁藏布江的交汇处 - to form the world's biggest.
形成了世界上最大的三角洲 - Every year almost 2 thousand million tonnes of sediment
每年大约有20亿吨泥沙在此沉淀 - eroded from the Himalayas is delivered to the ocean.
从喜马拉雅山脉上 崩塌下来的土石最终归于大海