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
Do I have to get it done by noon?
我必须在中午以前做完吗？
How was your flight? Was it comfortable?
你坐的班机怎么样？还舒服吗？
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;
在工业部门工作和在军队中服役的许多人对噪音有切身的体会，他们认为对这个问题进行调查是浪费时间，