Seroconversions
(seroconversion 的复数) n.[生][医]血清转化
🗣️ 情景例句
It is absolutely impossible.
这是绝对不可能的。
When three know it, all know it.
三人知，天下晓。
To protect themselves from the icy water, they had to wear special rubber suits.
湖水冰冷刺骨，他们必须穿上一种特制的橡皮服以保护自己。