Hematothorax
[医] 血胸
🗣️ 情景例句
This is very helpful, Mrs. Martinelli.
这样很有用， Martinelli太太。
The world is a ladder for some to go up and some down.
人间犹如一架梯，有人缘梯上升，有人顺梯下降。
What does that do?
这有什么用处呢？