什么是 reservation?The act of reserving; a keeping back or withholding.Something that is kept back or withheld.A limiting qualification, condition, or exception: has reservations about the proposal. A tract of land set apart by the federal government for a special purpose, especially one for the use of a Native American people.An arrangement by which accommodations are secured in advance, as in a hotel or on an airplane.The accommodations so secured.The record or promise of such an arrangement.