Elton's ring test

例句：

1. 1. This is the first time I've heard of Elton's ring test.
   这是我第一次听说艾尔顿环测试。
2. 2. The doctor used Elton's ring test to diagnose her condition.
   医生使用艾尔顿环测试来诊断她的状况。
3. 3. Elton's ring test has been proven to be effective in detecting certain cancers.
   艾尔顿环测试已被证明在检测某些癌症方面是有效的。