Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
G
o
o
g
l
e
|
Forvo
|
+
behaviour constraint
This HTML5 player is not supported by your browser
tech.
状况约束
;
工作
状况约束
;
动作约束
;
工作
状况制约
;
动作制约
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
