"If the ice had lasted much longer, all the porpoises would have died," says IHB's Hao Yujiang.

“如果湖面的冰冻持续地更久一点的话，所有的江豚都将死去，”水生生物研究所的郝玉江说。

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"If the ice had lasted much longer, all the porpoises would have died," says IHB's Hao Yujiang.

“如果湖面的冰冻持续地更久一点的话，所有的江豚都将死去，”水生生物研究所的郝玉江说。

youdao