annuli ['ænjʊˌlaɪ]

例句:

• The flowing state in narrow annuli changes apparently quicker than that in circular tube.
  窄环隙流道内流态由层流向紊流转变明显提前.
  
• The velocity profile should be confirmed when non - Newtonian fluid flowing in duct and annuli is researched.
  在研究 非 牛顿流体圆管和环空管流层流流动问题时,确定其速度分布是关键.