The nucleus, also known as nuclear syllable or tonic syllable, the syllable that bears thenuclear tone (a fall. rise, fall-rise or rise-fall) ()
出自:伊犁师范-英语语音

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按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
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