Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
4M1E men, machine, material, method, environment
space
人、机、料、法、环
(导弹、火箭和航天器研制所必备的各种条件)
Add
|
Report an error
|
Get short URL
|
Language Selection Tips