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他呢,狗嘴吐不出象牙。
He was born with his foot in his mouth
The elements of mind are to be discovered by systematic introspection.
Man will not merely endure: he will prevail.
The computing scientist's main challenge is not to get confused by the complexities of his own making.
煤炭不是问题所在,问题在于我们如何使用它。解决方案在于更清洁的技术和更好的利用。