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
Dinner's on me.
晚饭我请客。
That makes ten dollars, right?
这加起来是十美元，对吗？
or even the universe itself, must in the nature of things 'wear out'.
甚至宇宙本身，从事物的本质上来说都会磨损掉"。