critical mass-ratio

例句：

1. 1.The ratio of carbon to hydrogen in the fuel is critical for combustion efficiency.
   燃料中碳与氢的比率对燃烧效率至关重要。
2. 2. In the study, the researchers found that the critical mass ratio had a significant impact on the system's stability.
   研究中，研究人员发现临界质量比对系统的稳定性有显著影响。
3. 3. The engineers carefully calculated the critical mass ratio to ensure the safe operation of the equipment.
   工程师们仔细计算了临界质量比，以确保设备的安全可靠运行。