副词
中文翻译：毫无疑问
同义词：
['certainly', 'without a doubt']
例句：
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1.You can't deny the fact that he is an excellent teacher.
你无法否认他是一个优秀的教师。
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2. No doubt, she will be very happy to receive the gift.
毫无疑问，她收到礼物会非常高兴。
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3. No doubt, his success is due to his hard work and determination.
毫无疑问，他的成功归功于他的勤奋和决心。