Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Dutch
⇄
Arabic
Basque
Bulgarian
Catalan
Chinese
Croatian
Czech
Danish
English
Estonian
Finnish
French
German
Greek
Hungarian
Irish
Italian
Latvian
Lithuanian
Maltese
Norwegian Bokmål
Polish
Portuguese
Romanian
Russian
Slovak
Slovene
Spanish
Swedish
Turkish
Ukrainian
G
o
o
g
l
e
|
Forvo
|
+
systeemtheorie
f
environ.
teoria de sistemes
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
