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翻译解释
lengthen英语什么意思：vt. 延长，伸长，拉长。 lengthen a vowel 【语音】拖长母音音长。 vi. 变长；延伸；转为 (into). Summer lengthens (out) into autumn. 夏去秋来。 The days are lengthening. 白天长起来了...
