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                undulate的现在进行时为:undulating... 
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                undulate的现在完成时为:undulated... 
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                undulate的第三人称单数(三单)为:undulates... 
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                undulate的一般过去时为:undulated... 
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                undulate的音标:undulate的英式发音音标为:['ʌndjuleɪt]undulate的美式发音音标为:['ʌndʒəleɪt]... 
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                As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.我们一路南行,乡间开始变得起伏不平,绵延的山峦一直延伸到河岸。To undulate more freely, keep you hands about shoulder width apart.要波动的更自由些, 保持你的手与肩... 
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                As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.我们一路南行,乡间开始变得起伏不平,绵延的山峦一直延伸到河岸。To undulate more freely, keep you hands about shoulder width apart.要波动的更自由些, 保持你的手与肩...