Triangle of necessity
[医] 颈动脉下三角
🧩 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];
🗣️ 情景例句
Can I help you?
我能帮你忙吗？
Wash your mouth out with soap!
嘴巴放干净一点！
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。