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如果病痛复发，就服这种药。
If the pain recurs, take this medicine.
youdao
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这种药本身无害，但与酒同服就危险了。
The drug is not harmful per se, but is dangerous when taken with alcohol.
《牛津词典》
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这种药本身无害，但与酒同服就危险了。
The drug is not harmful per se, but is dangerous when taken with alcohol.
《牛津词典》