Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
G
o
o
g
l
e
|
Forvo
|
+
constraint curve
This HTML5 player is not supported by your browser
busin.
约束曲线
constraint
transition
curve
This HTML5 player is not supported by your browser
busin.
约束
缓和
曲线
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
