reservenoun(EXTRA PERSON)

the reserves

phrase[ plural ]
a group of people who are not permanently in the armed forces but are used only if needed: 后备军;后备部队
call up the reservesThey will call up the reserves.他们将召集后备军。
He joined the reserves ten years ago.
She's a medic in the reserves.
He joined the reserves to help pay for college.
Any increase in the number of troops would have to come from the reserves.
A lot of troops come from the reserves.
This forced the President to call up the reserves.
See also