fight or compete to a definite conclusion
战斗到分出胜负
(pl. battles royal)a fiercely contested fight or dispute
激战；激烈争论
(chiefly US)the positions taken by military personnel in preparation for battle (often used as a command or signal to prepare for battle)
(主 美)战斗岗位（常用作备战指令或信号）
an important step towards achieving something
成功的重要一步
he never gives in, and that's half the battle.
他从不认输，这就成功了一半了。