http://www.pons.de/produkte/3-12-517841-X/(牛津大学出版社授权产品)
 
 I. plain <plainer plainest> [美 pleɪn, 英 pleɪn] 形
1. plain (unadorned):
-  plain decor/cooking
 -  
 
-  plain language/style
 -  
 
-  plain language/style
 -  
 
-  plain envelope
 -  
 
-  plain fabric/dress
 -  
 
2. plain (clear):
3. plain (blunt, straightforward):
4. plain (not good-looking):
5. plain (downright):
-  plain
 -  
 
II. plain [美 pleɪn, 英 pleɪn] 副
在《PONS词典》中的词汇
 
 I. plain [pleɪn] 形
1. plain:
3. plain (clear, obvious):
-  plain
 -  
 
I. plain clothes 法律 名词
 
 I. plain [pleɪn] 形
1. plain:
3. plain (clear, obvious):
-  plain
 -