The dosage was geared down to a level which would work on the infected cells but not upset their normal metabolism. 药量已被减低到某一水平，既足以对付受感染的细胞，又不会干扰正常的新陈代谢。
The period of exercise was geared down to ten minutes a day for men over 60. 60岁以上的人的锻炼时间减低到每日十分钟。
