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English to Portuguese translations [PRO] Environment & Ecology
English term or phrase:upper/lower reaches
The Mekong, one of the world’s great river systems, generates power in its upper reaches in China and sustains the rice production and fishery systems that support the livelihoods of more than 60 million people in the lower reaches of its basin.
Os dicionários falam em "braços" de rio, mas não sei como colocar na frase. Obrigada desde já pela ajuda