英语语法分析

Thirdly, fuel control loop of ramjet is studied.

再次，冲压发动机燃油控制回路研究。

At present, the ramjet engine jet for military purposes to be optimistic.

目前，冲压式喷气发动机的军事用途被看好。

Thrust regulation is a key technology on the solid liquid rocket ramjet engine.

推力调节是整体式固液火箭冲压发动机研究的一项关键技术。