type 1b supernova造句
例句與造句
- Supernovae have been observed in NGC 2207 in 1975 ( type Ia SN 1975a ), 1999 ( the type Ib SN 1999ec ), 2003 ( type 1b supernova SN 2003H ), and 2013 ( type II supernova SN 2013ai ).
- It's difficult to find type 1b supernova in a sentence. 用type 1b supernova造句挺難的