轉碼失敗！請您使用右上換源切換源站閱讀或者直接前往源網站進行閱讀！轉碼失敗！請您使用右上換源切換源站閱讀或者直接前往源網站進行閱讀！ third of them are vacant.The school has only just recovered its vitality in the past two years, focusing on improving teaching and learning with all our might, so we haven't had much time to manage t...