sensible combustion period

例句：

1. 1. The safest way to handle flammablematerials is to ensure that the combustion period is monitored closely.
   处理易燃材料时，确保可燃物燃烧期得到密切监控是最为安全的方法。
2. 2. During the combustion period, the flames canbe intense and unpredictable.
   在燃烧期，火焰可能强烈且不可预测。
3. 3. Thecombustion period of a gasoline engine is typically measured in hours.
   汽油发动机的燃烧期通常以小时为单位进行测量。