並前往https://books.google.com.tw/books?id=T4ufDwAAQBAJ&pg=PA80&lpg=PA80&dq=focus%E6%96%B9%E5%90%91%E7%9B%A4%E8%AA%BF%E6%95%B4&source=bl&ots=VZA9aYCy-J&sig=ACfU3U06SUlypXiZp9kvAfPE-sTJM8MVrA&hl=zh-TW&sa=X&ved=2ahUKEwiMj6-Ast2AAxUWTWwGHRAYC5IQ6AF6BQiAARAD