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serum
sɪərəm ˈsɪrəm
Word forms: plural serums
1 N-VAR 免疫血清 A serum is a liquid that is injected into someone's blood to protect them against a poison or disease. 免疫血清
2 N-UNCOUNT 血清 Serum is the watery, pale yellow part of blood. 血清
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