| 释义 |
ecosystem 构词法3100 全国卷频次：3 教材出处：译林版必修B3U1 /ˈiːkəʊˌsɪstɪm/ n. ecosystems 2 生态系统 高考真题原句提选：The African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem.非洲象是地球上现存最大的陆地动物，对非洲的生态系统非常重要。Prevention is key, scientists says because once ecosystems pass their tipping point（临界点）, it is remarkably difficult for them to return. 科学家们说，预防是关键，因为一旦生态系统过了临界点，它们就很难恢复。 |