dose [dəʊs]

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n.(药的)剂量，一服；vt.给(药)；(给…)服药；vi.服药

a measured amount of something such as medicine

In the accident, the workers received a heavy dose of radiation. 在那次事故中，工人受到大剂量的辐射。
He gave me a dose of medicine for my cold. 他给我开了一剂治感冒的药。