並前往https://books.google.com.tw/books?id=Hum3EAAAQBAJ&pg=PA126&lpg=PA126&dq=focus+%E5%BE%8C%E9%9B%A8%E5%88%B7+%E6%9B%B4%E6%8F%9B&source=bl&ots=iXIO5r9C3T&sig=ACfU3U1FMNFY6t-lJjHZTqwa2okgvD2xtA&hl=zh-TW&sa=X&ved=2ahUKEwijv_-IrLD_AhUrDrkGHapmCDgQ6AF6BQj_ARAD