Alloantiserum
同种抗血清
🗣️ 情景例句
On a studect visa, full-time work is not permitted.
持学生签证的话，不允许做全职工作。
Could you tell me where I can find these books?
您能告诉我在哪儿能找到这些书吗？
If you think it is necessary.
如果你认为有这必要的话。