ramjet helicopter

例句：

1. 1. The ramjet helicopter was the first to land on the moon.
   喷气式直升机是第一个在月球上着陆的。
2. 2. The ramjet helicopter is a versatile aircraft capable of carrying heavy loads.
   喷气式直升机是一种多功能飞机，能够携带重物。
3. 3.The ramjet helicopter is used for military and civilian purposes.
   喷气式直升机用于军事和民用目的。