He had smoked for so many years that his teeth were permanently stained yellow. 他吸了那么多年烟,牙齿都被永久地熏黄了。
In the increased vibration, the quickening of movement of the molecular structure allows for the records to be reviewed and then released and erased for good. 在振动的增加中,细胞结构活泼的运作容许记录被检查,而随后被永久地释放与抹除。