cold hot中o发音不一样:
/əu/,/ɒ/
it's cold. you should wear a sweater . 天冷了,你应该穿毛衣。
It 's getting cold. we 'd better start wearing our padded jackets . 天冷了,棉衣该上身了。
His voice was hard and cold. he spoke with deliberation . 他的声音生硬而又冷淡,而且是字斟句酌地说着。
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