双语例句原声例句
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在文字出现之前，就有舞蹈语言了。
Before there was the written word, there was the language of dance.
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研究人员发现毒液甚至在蛇出现之前就已经进化出来了，大约在一亿年前。
The researchers found that venom evolved before snakes even existed, about a hundred million years before.
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在 Mosaic 出现之前，使用万维网的主要是科学家和其他技术人员，他们只是发送和接收文本就很开心了。
Before Mosaic, the web had been used mainly by scientists and other technical people, who were happy just to send and receive text.
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Two plus one equaled three before there were people; two plus one equals three now; two plus one will always equal three.
在人类出现之前,二加一就等于三,二加一现在等于三,并将永远等于三
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You have to practice before it happens.
你要在机会出现之前练习。
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