Pfo
[医][=patent foramen ovale(cordis)]卵园孔未闭（心脏）
🗣️ 情景例句
The wedding cake really looks delicious.
婚礼蛋糕看起来真好吃。
There's no such thing as a free lunch.
天下没有白吃的午餐。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。