Grass covering raised the moisture of the soil nearly by 1%, which most reflected the month of precipitation, there was no difference of grass covering in the non-rainfall or less rainfall month.

覆盖能提高土壤水分含量1%左右，但主要体现在降雨月份上，在非降雨月份或少降雨月份覆盖效果不显著。

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That is when it's not covered in snow and there is no frost covering the grass and vegetative parts of a plant's herbs and the flowers the marmots like to eat.

那时，地上没有冰雪覆盖，草木也没有结霜，土拔鼠喜欢吃的植物嫩芽和花蕾正开始生长。

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With so many plants animal and other living things covering the planet it can be tough to figure out what type of grass is growing by the roadside or what kind of bird just flew by.

参考译文正因为地球上有这么多植物、动物和其他生物，所以很难断定路边生长的草是什么类型，或者刚刚从身边飞过的鸟是什么种类。

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Pietersen would have been delighted to win the toss on wicket with a decent covering of grass which he must have thought might offer the seam bowlers some early bounce and movement.

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Last week the company said it was looking at the possibility of giving the grass runway at Land's End airport a hard covering, and that a decision would be made "soon".

BBC: Skybus