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单词 θ53144
释义
the world > food and drink > farming > cultivation or tillage > [noun] > soil conservation (4)
soil sample1902

a sample of soil taken for scientific investigation.

soil sampling1927

soil conservation1932

the protection and safeguarding of the soil against erosion, loss of fertility, and damage.

fixation1953

The action of fixing, in various senses (see fix, v.).

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