並前往https://books.google.com.tw/books?id=JLTVa-hBn6wC&pg=PA9&lpg=PA9&dq=rough+terrain&source=bl&ots=kIdnKi68hV&sig=ACfU3U373DtarK7sRXZQMD7bE_F5loyujQ&hl=zh-TW&sa=X&ved=2ahUKEwiFpLyvrbX4AhXlIzQIHdLtCDwQ6AF6BQjXAhAD