Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
German
Japanese
Russian
+
G
o
o
g
l
e
|
Forvo
|
+
to phrases
main image
This HTML5 player is not supported by your browser
opt.
Hauptbild
n
main image
:
2 phrases
in 1 subject
Optics
branch of physics
2
Add
|
Report an error
|
Get short URL
