副词
中文翻译：四倍地
同义词：
['double', 'thrice', "fourfold例句：1. The company's profits have quadrupled since the new policy was implemented.（自从实施了新政策，这家公司的利润已经翻了四倍。）"]
例句：
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1. The company's profits have quadrupled since the new policy was implemented.
自从实施了新政策，这家公司的利润已经翻了四倍。
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2.He doubled his efforts to finish the project on time.
他加倍努力，按时完成了这个项目。
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3. The cost of the materials has been quadrupled due to the increase in demand.
由于需求的增加，这些材料的成本已经翻了一番。