战斗

fight; battle; combat; action; engagement; struggle; warfare; skirmish; fray; scrap; tussle; bout; melee; scuffle; clash; confrontation; contest; duel; engage; contend; anti-

升级

upgrade; upscale; enhance; advance; step up; move up; level up; escalate; intensify; upgradation; escalation; enhancement; upgraded; enhanced