monotone /ˈmɑːnəˌtoʊn/ noun Learner's definition of MONOTONE
[singular]
: a way of talking or singing without raising or lowering the sound of your voice单调的语调;单调的声调 -
She read the story in a dull monotone.她用枯燥的单音调读这个故事。
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He sang in a soft, low monotone.他用轻柔低声的单调声调演唱。
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She spoke in a monotone voice.她讲话声音单调。