The temperature drop during the Cretaceous period would almost certainly have wiped out an 'abundance' of the world's dinosaurs.

　　曾经称霸地球显赫一时的恐龙，在白垩纪时代的这次温度巨变中，似乎全都灭绝了。

　　The scientists behind the ground-breaking study claim this would have been the first major step dinosaurs took on their eventual road to extinction.

　　在这次前所未有的研究中，科学家们声称，温度巨变只是恐龙们走上灭绝之路的第一步。