adj.先发制人，先买的，有先买权的

The military launched a preemptive strike against the enemy's missile site.
军队对敌方导弹基地发起了先发制人的打击。
She decided to make a preemptive apology in case her words caused any misunderstanding.
她决定先发制人地道歉，以防自己的话引起任何误解。
To avoid traffic, he left for work early, taking a preemptive measure against delays.
为了避免堵车，他早早地去上班了，这是他对可能延误采取的一种先发制人的措施。
The company announced a preemptive price cut to counteract its competitor's upcoming promotion.
该公司宣布提前降价，以对抗竞争对手即将进行的促销活动。
In chess, a pawn can make a preemptive move to control a key square on the board.
在国际象棋中，兵可以先行一步控制棋盘上的关键位置。
As a security measure, the IT department performed a preemptive system update to prevent potential cyber attacks.
作为一项安全措施，IT部门进行了先发制人的系统更新以防止潜在的网络攻击。
He took a preemptive nap so that he wouldn't fall asleep during the meeting later.
他预先打了个盹儿，以免稍后开会时睡着。
The government issued a preemptive travel advisory warning citizens about potential health risks abroad.
政府发布了一项先发制人的旅行警告，提醒公民注意海外潜在的健康风险。
The athlete chose to undergo preemptive surgery to prevent a more serious injury in the future.
这位运动员选择接受预防性手术，以防止未来可能出现更严重的伤势。
To maintain market dominance, the tech giant made a series of preemptive acquisitions of smaller startups.
为了保持市场主导地位，这家科技巨头预先收购了一系列小型初创公司。