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Speculations about its nature have been going on for literally thousands of years.
关于它的实质的种种推测,确实已进行了数千年之久.
《用法词典》
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The front door bell jangled viciously, interrupting the delightful speculations.
前门的门铃剧烈地响了起来, 打断了玛莎小姐的美妙推测.
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