Nssdc
abbr. National Space Science Data Center <美国>国家空间科学资料中心
🗣️ 情景例句
I'd like to check this book out.
我想借这本书。
But, at the same time, they wish he weren't going so far away.
但同时，他们希望他不要离得这么远。
I appreciate John's helping in time.
我感谢约翰的及时帮助。