Circle of willis
动脉环；脑底动脉环；韦氏动物环；[解剖] 韦利斯氏环
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
n. 威利斯（姓氏, 男名）
🗣️ 情景例句
There's nothing you can do about it.
你对此无能为力。
Bye! Have a good day.
再见！请慢走！
Oh dear! What shall I do?
哎呀！我怎么办呢？