A defensive strategy involving strengthening fortifications and removing all resources and supplies from the surrounding areas, making it impossible for an invading enemy to gain provisions or sustenance.
为了避免竞争对手获取重要信息，公司决定采取固壁清野的策略，销毁了所有旧资料，并加强了数据安全。
To prevent competitors from obtaining crucial information, the company decided to adopt a strategy of fortifying its defenses and clearing the area, destroying all old data and enhancing data security.
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