尤指在战斗中为达某种目的而可牺牲的物品如容易补充的军需给养装备等或人员如掩护退却的少数部队
Especially refers to items that can be sacrificed for a certain purpose in battle, such as easily replenished military supplies, equipment, etc., or personnel, such as covering a small number of retreating troops
以上为机器翻译结果，长、整句建议使用 人工翻译 。