Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
German
+
G
o
o
g
l
e
|
Forvo
|
+
principle of the shortest optical path
This HTML5 player is not supported by your browser
opt.
Prinzip des kürzesten Weges
Add
|
Report an error
|
Get short URL
