但是速度更快的直升机将大有作为，特别是救援任务和军事行动。因此工程师们始终如一地寻找办法来制造这种更快的直升机。

But faster helicopters would be useful, particularly for rescue missions and military operations, so engineers are constantly looking for ways to make them.

youdao

但是速度更快的直升机将大有作为，特别是救援任务和军事行动。因此工程师们始终如一地寻找办法来制造这种更快的直升机。

But faster helicopters would be useful, particularly for rescue missions and military operations, so engineers are constantly looking for ways to make them.

youdao