Cd4
abbr. CD4细胞；CD4抗艾滋病药（Cluster of Differentiation 4）
🗣️ 情景例句
Nowadays many TV programs need parental guidance.
现在许多电视节目需要在家长指导下观看。
Other buyers are satisfied with it, but we could delay it if you could pay 40 percent up front.
其他买主对这货物很满意，但如果你能先付40%货款，我们可以延迟交运。
What's going on?
发生什么事了？