Ballistic missile technology and rocket science.

弹道技火箭研究。

youdao

He trained to be an engineer and was sent to Russia to study missile technology.

他被训练成一名工程师，并被送到俄罗斯学习导弹技术。

youdao

He trained to be an engineer and was sent to Russia to study missile technology.

他被训练成一名工程师，并被送到俄罗斯学习导弹技术。

youdao