Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Swedish
⇄
Afrikaans
Arabic
Basque
Catalan
Chinese
Danish
Dutch
English
Estonian
Finnish
French
German
Greek
Hungarian
Italian
Korean
Lithuanian
Persian
Polish
Portuguese
Russian
Slovene
Spanish
Turkish
Ukrainian
G
o
o
g
l
e
|
Forvo
|
+
optimal stratifiering
math.
最优分层
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
