Paraserum reaction
[医] 副血清反应
🧩 词语组成解析
🗣️ 情景例句
What are you up to?
你呢？你怎样？
It's up to you.
由你决定。
It can copy a long report and sort the copies and pin them together.
现它可以复印长篇的报告，把复印件分类，并装订起来。