Flack's node
[医] 弗勒克氏结, 窦房结
🧩 词语组成解析
node
[nəud]
n. 节点;（计算机网络的）节点;[医]结节;植物的节;
🗣️ 情景例句
Do you hike or fish on your trips?
旅游时，你会步行或钓鱼吗？
How did you recognize him?
你是如何认识他的？
I don't know his number. Did you write it down?
我不知道他的电话号码。你记下来了吗？