| 单词 | level 2 study |
| 释义 | level 2 studylevel 2 studyClinical research A retrospective study which employs preexisting data–eg, hospital charts to test a hypothesis or project possible cause-and-effect relationships. Cf Prospective study. |
| 随便看 |
|
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。