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
Persian
Polish
Portuguese
Russian
Slovene
Spanish
Swedish
Turkish
Ukrainian
G
o
o
g
l
e
|
Forvo
|
+
to phrases
符号检验
math.
sign test
tech.
character check
符号检验
:
22 phrases
in 8 subjects
Air defense
2
Animal husbandry
1
Drilling
1
Electronics
3
Mathematics
6
Metallurgy
1
Technology
7
Telecommunications
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