Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity，the number of species in a particular ecosystem，to the health of the Earth and human well-being.
(倒装coincident with concerns…has been…=…has been coincident with
concerns…)
在对物种和动物栖息地加速消失表示关注的同时，人们也越来越认识到生物多样化，即一个特定生态系统中物种的数量对地球的健康以及人类幸福的重要性。
分句1：Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity
分句2：the number of species in a particular ecosystem.
分句3：to the health of the Earth and human well-being.
分句1内部构成倒装，正常语序应该是concerns about the accelerating loss of species and habitats has been coincident with a growing appreciation of the importance of biological diversity to the health of the Earth and human well-being.
所以真正的主句经过精简之后是concerns has been coincident with a growing appreciation.
分句2是一个插入语，用来解释说明分句1结尾的biological diversity.
版权声明：本文系网独家稿件，版权为网所有。转载须注明来源及作者，否则必将追究法律责任。
微信扫描下方二维码，第一时间知晓托福考试真题预测及解析，还有北美留学最新动态喔~(微信号：toefl120)!