浆液, 血清

n an amber, watery fluid, rich in proteins, that separates out when blood coagulates

serums的用法和样例：

例句

The doctor inoculated her with the serum.我们所有人都注射了天花病毒。
Human or animal serum containing antibodies that are specific for one or more antigens.抗毒血清，抗毒素包含对一种或多种抗原的特异抗体的人体或动物血清

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