並前往https://books.google.com.tw/books?id=nVmnDwAAQBAJ&pg=PA502&lpg=PA502&dq=loop&source=bl&ots=DlvatJyALQ&sig=ACfU3U35rRxS7Ms8ue3_r6eIvhJO5qFLCQ&hl=zh-TW&sa=X&ved=2ahUKEwiezLPJnJz-AhWuxQIHHQl4DfsQ6AF6BQj6AhAD