他们立刻挖壕防护自己。
They entrenched themselves at once .
youdao
该营直接开到机场掘壕防守。
The battalion went directly to the airport to begin digging in.
步兵一拿下敌军阵地，立即掘壕固守。
As soon as they had seized the enemy position, the infantry dug themselves in.
管理层的挖壕自守效应；
The management's entrenchment effect.
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