並前往https://books.google.com.tw/books?id=f2Y_buRFDt0C&pg=PA50&lpg=PA50&dq=Let's+Sing+ptt&source=bl&ots=GxQasN9s-2&sig=ACfU3U3gA8XJEwwfpEkPs57ny4YwTHy5AA&hl=zh-TW&sa=X&ved=2ahUKEwjH0YLu27eAAxV-cPEDHYB-CzAQ6AF6BQiuARAD