Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
Afrikaans
Arabic
Basque
Catalan
Danish
Dutch
English
Estonian
Finnish
French
German
Greek
Hungarian
Icelandic
Italian
Korean
Lithuanian
Norwegian Bokmål
Polish
Portuguese
Romanian
Russian
Serbian
Slovene
Spanish
Swedish
Turkish
Ukrainian
G
o
o
g
l
e
|
Forvo
|
+
to phrases
第
一级单位
math.
first stage unit
一级 单位
:
4 phrases
in 4 subjects
Aviation
1
Economy
1
Technology
1
United Nations
1
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips