Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
Talk 协议 IRDIUM 铱星系统
美国铱星公司的低轨道卫星通信系统,原计划为77颗卫星,与铱原子核外围的电子数目相同,后改为 66 颗卫星,但仍保留 "铱"的名称,运营一年半后于2000年3 月停运
telecom.
Internet Relay Chat
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips