R.f.t. classes
[医] Rh分组(血族)
🧩 词语组成解析
[医] 右额横(胎位)
n. 级别, 阶级（class复数形式）
🗣️ 情景例句
What's that?
什么事？
Every one's faults are not written in their foreheads.
知人知面不知心。
Do we have to wear the helmets?
我们得戴上防护帽吗？