为了维护我国开发国际海底资源的权益，必须大力发展深海技术。

In order to protect our country's rights and interests of exploitation, we must develop deep sea technology actively.

youdao

为了维护我国开发国际海底资源的权益，必须大力发展深海技术。

In order to protect our country's rights and interests of exploitation, we must develop deep sea technology actively.

youdao