Cd4
abbr. CD4细胞；CD4抗艾滋病药（Cluster of Differentiation 4）
🗣️ 情景例句
May I pay in cash?
可以付现金吗？
It's two blocks straight ahead.
笔直向前走2街区。
Because I've just retired.I want to buy a small house in the country.
因为我刚退休。我想在乡下买幢小房子。