reserves

1.

dự trữ

refrain from using or disposing of (something); retain for future use.

:
roll out half the dough and reserve the other half
1.

dự trữ

a supply of a commodity not needed for immediate use but available if required.

:
Australia has major coal, gas, and uranium reserves
2.

dự trữ

a force or body of troops kept back from action to reinforce or protect others, or additional to the regular forces and available in an emergency.

:
the men were stationed as a central reserve ready to be transported wherever necessary