downward modulation向下: downward; down调制: mingle; toss; lard; modulate ...下调制: downward modulation向下调变: downwardmodulation向下调用: downward call下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:向下调制，即可在微信中查询翻译
