Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Catalan
⇄
Arabic
Basque
Bulgarian
Chinese
Croatian
Czech
Danish
Dutch
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
|
+
radiació de fons
environ.
背景辐射
来自于自然界的辐射而非来自于人为来源的辐射,正常情况下人们每日都暴露于此辐射下,例如来自于岩石和土壤。
Add
|
Report an error
|
Get short URL
|
Language Selection Tips