Sigma reaction
[医] 西格马反应, δ反应(梅毒的絮凝反应)
🧩 词语组成解析
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
They know that I'm married and that I have a family.
他们知道我结婚了， 有一个家。
What time do you think it is?
你以为现在几点？
OK, Mom! said Lucy.
“好的，妈妈！”露西说。