intermittent-firing duct engine

例句：

1. 1. Theintermittent-firedducted engine is a popular choice foraircraft.
   间歇式喷气发动机是飞机的热门选择。
2. 2. The intermittent-fired ducted engine has beenwidely used in various industries.
   间歇式喷气发动机在各行业中得到了广泛应用。
3. 3. The intermittent-fired ducted engine is known for its high efficiencyand low noise levels.
   间歇式喷气发动机以其高效率和低噪音水平而闻名。