並前往https://books.google.com.tw/books?id=kZEmEAAAQBAJ&pg=PA123&lpg=PA123&dq=playground%E5%8D%A1%E9%89%97%E9%96%8B%E7%AE%B1&source=bl&ots=iOfFsRoJEk&sig=ACfU3U3s6qvAxzLaVVHjUuzG6FFJLIrUyg&hl=zh-TW&sa=X&ved=2ahUKEwii7fTk1auBAxV8TKQEHRH3BTUQ6AF6BAhvEAM