一年级学生斯特拉·金姆正在努力钻研四分之三罩冠。

First-year student Stella Kim works on a three-quarter crown.

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上图中的罗伯特·潘医生正在与一年级学生蕾妮·卡尔金斯讨论四分之三罩冠（three-quarter-crown ）的准备问题。

That's Dr. Robert P. Ha in the photo above discussing a three-quarter-crown preparation with first-year student Renee Calkins.

youdao

上图中的罗伯特·潘医生正在与一年级学生蕾妮·卡尔金斯讨论四分之三罩冠(three - quarter - crown)的准备问题。

That's Dr.Robert P.Ha in the photo above discussing a three-quarter-crown preparation with first-year student Renee Calkins.

youdao