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翻成英語的,盡量地道一些吧:現(xiàn)在幾百萬公頃的土地使用塑料膜(plastic mulch),單單在中國,1989年就使用了二百八十六萬七千多公頃的地膜,這一增長是很顯著的,1979年才使用40多公頃。 翻成中文的,我來拿不準(zhǔn)意思: There are as many partial derivatives(偏導(dǎo)數(shù))of the first order(一階)as there are independent variables(自變量). |

新蟲 (初入文壇)

鐵桿木蟲 (著名寫手)
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The plastic mulches are used on the ground of millions of hectares. Only in China, the areas of the mulches were two millions eight hundreds and sixty seven thousands (2,867,000) hectares in 1989, a remarkable increase compared with the year of1979, whose corresponding areas were over forty hectares. 有多少獨(dú)立變量,就有多少一階偏導(dǎo)數(shù)。 |

木蟲 (著名寫手)
| plastic mulch is now used in millions of hectares of soil, In china alone, over 2,867,000 hectares of plastic mulch is used in 1989, compared with 40 hectares in 1979, it's a remarkable increase. |
木蟲 (著名寫手)
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