spontaneouslyの基本例文
The idea for the book came to him spontaneously one day.
その本のアイデアはある日 spontaenously に彼に浮かんできた。
She broke into song spontaneously when she heard the music.
彼女は音楽を聞いて spontaenously に歌いだした。
The flowers had grown spontaneously in the meadow.
草原で花が spontaenously に育った。