... maintenance：维护，维修 preventive maintenance：预修，防护性维护 corrective maintenance：修理性维护 ...
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离子引擎射流有轻微放射性，因此维护关键离子引擎部件的技师常穿防护服。
Ion engine emissions are mildly radioactive, and technicians who work on vital ion engine components often wear protective gear.
防护码技术的安全性在于其环环相扣――每个防护码所保护的代码段，都包含维护其他防护码的代码。
The security of the guards actually comes from guards watching each other's backs. Each guard protects fragments of code, and that includes protecting other guards.
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