Here he stood rocking himself to and fro upon his short legs, baring his fangs in hideous grinnings, rumbling out an ever increasing volume of growls, which were slowly but steadily increasing to the proportions of roars.

露出他的尖牙， 露出可怕的笑容， 发出越来越大的咆哮声， 这些咆哮声慢慢但稳定地增加到咆哮的比例。