n the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose
n a resource
常见例句
1
assistance.
2
v give help or assistance
3
an associate who provides cooperation or assistance v
4
n a civilian reserve component of the United States Air Force that provides prompt mobilization during war and assistance during national emergencies
5
-ing form of ang n a civilian reserve component of the United States Air Force that provides prompt mobilization during war and assistance during national emergencies
