Taking the abandoned delta of Huanghe River as a case, this paper analyzed the natural and artificial driving forces of ecosystem degeneration, with the degeneration course investigated.

本文以废黄河三角洲为例，分析了废黄河三角洲生态系统退化的自然和人为应力以及生态系统的退化过程。

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Some jobs are expected to be opened to women this year, while others - including for special forces such as the Navy Seals and the Delta Force - could take longer.

BBC: Pentagon ends ban on women in frontline combat