Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
to phrases
X 射线背景
eng.geol.
X-ray background
射线 背 景:
3 phrases
in 3 subjects
Geology
1
Space
1
Technology
1
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
