vocabulary building
ボキャブラリービルディング
https://source.unsplash.com/featured/?vocabulary-building#.png
/suto3/google.iconvocabulary building
/suto3/Google画像検索.iconvocabulary building
/suto3/Google定義検索.icon vocabulary building
/suto3/wikipedia.iconvocabulary building
/suto3/weblio.icon vocabulary building
/suto3/kotobank.icon vocabulary building
/suto3/jisho.icon vocabulary building