並前往https://books.google.com.tw/books?id=LYQ5AAAAMAAJ&pg=PA21&lpg=PA21&dq=block&source=bl&ots=Y0q9l3Wx9b&sig=ACfU3U2Mnn3fJYU7rbWwnTTXFTXvwwnSYw&hl=zh-TW&sa=X&ved=2ahUKEwiOsuXW6uf8AhUCRDABHawVDnAQ6AF6BQjuAhAD