宇航局航天工作负责人葛斯坦麦尔说，宇航局正在不断从过去汲取经验。

NASA's Space Operations chief, William Gerstenmaier, says the agency continues to learn from its mistakes.

youdao

宇航局航天工作负责人葛斯坦麦尔说，宇航局正在不断从过去汲取经验。

NASA's Space Operations chief, William Gerstenmaier, says the agency continues to learn from its mistakes.

youdao