Along with mulching fixed number years lengthening, because of remains film recovery rate is low, the amount of remains film in the soil progressively increase and cause film pollution.

随着地膜覆盖栽培年限的延长，由于残膜回收率低，土壤中残膜量逐步增加，造成地膜污染。

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The results show that under otherwise equal conditions the absolute values of edge effect in plant population progressively decrease as the horizontal edge distance progressively increase.

结果表明：在同一条件下，植物群体边缘效应的绝对值随水平边距递增而递减。

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The reservoir drawdown also affects stress and settlement distribution of the protection embankment, and both the stress and settlement progressively increase with the reservoir level drops.

水库泄降对防护堤的应力和沉降分布也有影响，应力和沉降随着水库泄降而增大。

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Assuming extra investment increases output by progressively smaller amounts as the capital stock expands, then at some point extra investment will reduce, not increase, the long-run sustainable level of consumption.

ECONOMIST: Economics focus