"That it is practically impossible to avoid coming into contact with them," says Frederick vom Saal, a biologist at the University of Missouri.

“避免与它们接触是基本不可能的。”密苏里大学的生物学家 Frederick vom Saal 说。

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While many of these statements might be true, they are practically impossible to prove scientifically.

尽管这些说法可能成立，但它们实际上很难用科学手段证明。

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It's practically impossible to write a good essay without a clear thesis.

如果你没有清晰的论题，是不可能写出一篇好论文的。

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It's practically impossible to begin a reading of Milton without the burden of innumerable prejudices and preconceptions.

想要不带大量的偏见或成见的解读米尔顿,几乎是不可能的。

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And those that did were so rare that they were practically impossible to find.

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An income under this level makes paying for basic living expenses difficult and saving is practically impossible.

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Raising assets over the past two years was practically impossible and banks were unwilling to finance new deals.

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