background extinction
基础科学

        Definition:Background extinction,also known as “normal extinction”,refers to theextinction in earth’s geological and biological history before humans became a primarycontributor to extinctions.背景灭绝bèi jǐng miè jué指地质生物历程中生物由于自身的原因在正常环境状况......（本文共 541 字）     [阅读本文] >>