大自然最让人惊叹的是它的无限多样性。The most amazing thing about nature is its infinite variety.我们一点都不抵触多样化；实际上，我们需要多样性更丰富一些。We have nothing against diversity; indeed, we want more of it.自然环境保护主义者大多致力于保持物种的多样性。Conservationists are mostly ...
The new drug lessens the severity of pneumonia episodes.新药减轻了肺炎发作时的痛苦。Polluted water lessens crop yields.受污染的水源会降低农作物产量。Alcohol lessens resistance to diseases.含有酒精的饮料会减弱对疾病的抵抗力....
The era of the backwoods rube is gone.落后地区乡巴佬的时代已成过去.You must not carry on as if you had just come from the backwoods.你的行动决不能象你刚从边远地区来似的.Search deep in the woods for a score of 350 on Bruno's Backwoods Breakaway.现在就...
跟肉铺老板要煲汤用的骨头（最好是髓骨）。Ask the butcher for soup bones (marrow bones are best).直血管降支呈束状进入髓质.The descending vasa recta run in bundles into the medulla.髓质血流汇入粗而短的薄壁静脉.Blood from the medulla enters short, stout, thin - walled v...