研究人员在马代拉河捕获的鱼中发现高水平的含汞量。

Researchers have found high levels of mercury in fish caught in Madre DE Dios.

youdao

在1960年代，前苏联为了灌溉棉花与稻田，对锡尔河与阿姆河进行了改道。

In the 1960s the former Soviet Union diverted the Syr Darya and Amu Darya for the irrigation of cotton and paddy fields.

youdao

从20世纪70年代到80年代，在此繁荣景象出现之前持续了十年干旱，干旱扩大了灌溉的需要，导致墨累河成了涓涓细流。

But the ten years of drought before this efflorescence followed a huge expansion of irrigation in the 1970s and 1980s that reduced the flow of the Murray to a trickle.

youdao