采用新材料可以有效地减轻运载火箭的结构质量，增加运载火箭的射程。

Applying new material may decrease efficiently structure mass of rocket and increase range of rocket.

youdao

采用新材料可以有效地减轻运载火箭的结构质量，增加运载火箭的射程。

Applying new material may decrease efficiently structure mass of rocket and increase range of rocket.

youdao