lengthen怎么读
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- 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...