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
What a pleasant surprise running into you.
碰见你真是太棒了！
Go three blocks and make a right. It's right there.
过3个街区，然后往右拐。那里就有个邮局。
The child sobbed sadly.
小孩伤心地抽泣着。