プログレッシブ和英中辞典(第4版)の解説
じょうじゅん【上旬】
the first ten days (of a month)
3月上旬に
「at the beginning of [early in/in early] March
来月上旬に
early [in the first ten days of] next month
日本語の解説|上旬とは
the first ten days (of a month)
3月上旬に
「at the beginning of [early in/in early] March
来月上旬に
early [in the first ten days of] next month