The dosage was geared down to a level which would work on the infected cells but not upset their normal metabolism. 藥量已被減低到某一水平，既足以對付受感染的細胞，又不會(huì )干擾正常的新陳代謝。
The period of exercise was geared down to ten minutes a day for men over 60. 60歲以上的人的鍛煉時(shí)間減低到每日十分鐘。
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