扼守，指利用险要地形坚守防御。如：敌人用一个团的兵力扼守桥头，妄图阻止红军前进。
n. guard
misc. hold (a strategic point)
战士们扼守住山口，打退了敌人的进犯。
The soldiers held the mountain pass and beat back the intruders.
焦山扼守着长江的咽喉，自古是兵家必争之地。
Mte guardian of the Yangtze River by the throat, has always been contested.
公司拥有完善的产品售后服务体系并扼守为客户提供优质产品的承诺。
The company has perfect after service system and insisting on the promise "to supply superior quality product to customers".
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