heao 2造句
造句与例句手机版
- Using Atlas-Centaur launch vehicles, highly successful missions were started in August 1977 ( HEAO 1 ), November 1978 ( HEAO 2, also called the Einstein Observatory ), and September 1979 ( HEAO 3 ).
- It's difficult to see heao 2 in a sentence. 用heao 2造句挺难的