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In fact, they are prescribed and they’regiven at a certain level, a dosage that is understood by a practitioner who’s been trained.
出自-2016年6月聽力原文
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Drugs that are safe in the dosage stated on the label may be very dangerous in large doses.
2017年12月六級真題（第二套）聽力 Section C
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In fact, they are prescribed and they're given at a certain level, a dosage that is understood by a practitioner who's been trained.
2016年6月六級真題（第二套）聽力 Section B