保卫中国海还必须大力发展军事地球物理学研究。

Meanwhile, from the viewpoints of state safety, military geophysics must be enforced to safeguard the China seas.

youdao

保卫中国海还必须大力发展军事地球物理学研究。

Meanwhile, from the viewpoints of state safety, military geophysics must be enforced to safeguard the China seas.

youdao