动词
中文翻译：保证
同义词：
['ensure', 'guarantee', 'warrant']
例句：
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1.The company promises to deliver the goods within three days.
公司承诺在三天内交付货物。
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2.He guaranteed his word that he would return by the end of the month.
他保证他会在月底之前回来。
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3. The government guarantees citizens' rights and freedoms.
政府保障公民的权利和自由。