The result is inevitable. 结果无法避免

183. Venom from a gland in its jaw
     下颚腺体分泌的毒液
184. prevents the blood of its prey from clotting,
     使猎物的血无法凝结
185. leading to a dangerous drop in blood pressure.
     导致血压急剧下降
186. The result is inevitable.
     结果无法避免
187. This is an echo of what life was like back in the Triassic.
     这是三叠纪时期生活的历史回声
188. Mammals must fight for their lives,
     哺乳动物必须为生存而战
189. while reptiles dominate with a confident swagger.
     而爬行动物则以自信的姿态 统治着世界

来自《我们星球上的生命 第一季 第四集 Life on Our Planet S01E04 冷血动物》第 186 行