pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs 同义词：headache, head ache,
例句与用法
1.
As reported in the medical journal cephalalgia , the subjects said they felt an increase in pain or discomfort during 68 per cent of all trials 在医学杂志cephalalgia上发表的研究报告表明，在68 %的试验中，研究对象称感到头痛或不适症状加重。
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