There were 22 plots whose herb layer total cover density less than 15 and 20 plots whose herb layer species less than 5.

草本层的物种数低于5种的样方有20个，有22个样地的草本层总盖度低于15。

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Plant cover was signifisantly changed after improved. Total cover was increased from 42.5 to 83.5%. Plant community was also changed.

植被盖度由原来的42.5%增加到83.5%，将蒿属植物为建群种的群落变为沙打旺—野艾蒿—万年蓬组成的群落。

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By constantly denying the existence of such technology, research into total control of the human mind and body has been able to race ahead under almost total cover.

通过不断否认这种技术的存在，对人类身体和精神的总的控制的研究曾经远远领先于其他国家。

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The total development will cover an area of 29, 000 square metres - the size of five football pitches.

BBC: The Ikea store is set to open on the outskirts of Belfast

The four lease blocks cover a total of 20, 000 acres which offer extensive potential for further development.

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"If this year we don't have enough oil to cover the total consumption worldwide, then the price will increase to a dangerous level, " he says.

BBC: Spain's bumper olive years come to bitter end