effective mass ratio

例句：

1. 1. The engineer calculated the effective mass ratio of the new engine design.
   工程师计算了新发动机设计的有效性质量比。
2. 2.The team needs to determine the effective mass ratio for optimal performance.
   团队需要确定有效的质量比以获得最佳性能。
3. 3.The researcher found that the effective mass ratio could significantly affect the stability of the system.
   研究员发现，有效质量比可以显著影响系统的稳定。