Switch from a grow-in to a maintenance fertilizer regime at 4 to 6 weeks after emergence, or when the grass has reached nearly 100% ground coverage.

一般在发芽后4 - 6周，或者当草坪100%完成地面覆盖后从生长期用肥转换到养护用肥。

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The reputation mechanism of the exchange rate policy, has considered as the most convincing research idea about the current analyzing issue of the maintenance of the fixed exchange rate regime.

汇率政策信誉机制，被看作是当前分析固定汇率制可维持问题上最具说服力的一种研究思路。

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