MRA

例句：

1. 1. MRA stands for "Medical Research Alliance".
   MRA代表“医疗研究联盟”。
2. 2. The MRA is responsible for coordinating the research efforts of all the participating organizations.
   MRA负责协调所有参与组织的研究工作。
3. 3. The MRA has established a new policy to improve the quality of medical research.
   MRA已经制定了一项新政策，以提高医学研究的质量和效率。