A Swiss conservationist says a team of scientists has failed to find a rare freshwater dolphin that once swam in China's Yangtze river, making it almost certain the animal is extinct.
A Swiss conservationist says a team of scientists has failed to find a rare freshwater dolphin that once swam in China's Yangtze river, making it almost certain the animal is extinct.
一名瑞士环保人士说，一个科学家小组没能找到曾经在长江里生活的一种稀有淡水豚，因此几乎可以肯定已经灭绝。