並前往https://books.google.com.tw/books?id=sQDlDwAAQBAJ&pg=PA118&lpg=PA118&dq=focus%E4%BA%94%E9%96%80&source=bl&ots=j3g2eQAtCw&sig=ACfU3U3aQgOO3s_Lbqm2mutF3xmGyethuQ&hl=zh-TW&sa=X&ved=2ahUKEwiatM6C6PaBAxVdgP0HHa2-Al0Q6AF6BQjAARAD