Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
+
G
o
o
g
l
e
|
Forvo
|
+
to phrases
constraint rule
This HTML5 player is not supported by your browser
IT
★
约束规则
constraint rule
:
1 phrase
in 1 subject
Aviation
1
Add
|
Report an error
|
Get short URL
