Landscape fragmentation is one of the major reasons drastic degression loss of biodiversity over the world.

景观破碎化是生物多样性下降的最主要的原因之一.

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PD's clinical characters are thrillingness, muscle rigidity , bradykinesia and the degression of independence ability.

其临床特征为震颤 、 强直、运动迟缓以及自主能力的下降.

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