在航天界有一句老话：外行谈技术，内行谈保险。

There's an old saying in the space world: amateurs talk about technology, professionals talk about insurance.

模态试验边界转换的问题，始终是航空航天界关心的课题之一。

For the problem of the mode test boundary transformation, it has been one of the topics concerned in aviation and spaceflight field all the time.

平动点轨道在深空探测领域具有重要的应用价值，引起了国内外航天界的密切关注。

Libration point orbits have the important applications in deep space exploration, and have been paid more attentions from all over the world.