20-07-23 周一发布的一项研究称，气候变化正在饿死北极熊并迫使它们灭绝。该研究预测，北极熊这一食物链顶端的食肉动物可能会在百年内几近灭绝。 Climate change is starving polar bears into extinction, according to research published Monday that predicts the apex carn...