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但是美国不可能长期保持占gdp约9%的预算赤字规模。
But America cannot long maintain a budget deficit of almost 9% of GDP.
至本世纪中叶,世界人口将增长约1/3,达到90亿,而石油和煤炭储量正不断降低,要保障充足的能源供应,这些生产工艺必不可少。
Such technologies are needed to assure adequate energy as the world’s population grows by nearly a third, to nine billion people by the middle of the century, while oil and coal reserves dwindle.
人体中的大部分细胞都不可逆的分化成了约200种类型。
Most cells of the human body are irreversibly specialised or "differentiated" into roughly 200 types.
The stinkiness of poop is not an irreducible fact about the universe.
大便的臭味,是宇宙中不可约的事实。
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