If I were on a system where -lsun ought to provide getpwnam , I'd have been able to look at the exact command line used to check for it, and the test program used.
如果我的系统中，- lsun应该提供getpwnam，我应该可以使用命令行来对其进行确切检查，然后再使用测试程序。
Recharge system with refrigerant, check and test regulators, calibrate system and perform routine maintenance or servicing.
给系统添加制冷剂，检查和测试的调节器，校准系统，并进行日常维护或维修。
Modern weapon all equip advanced fire control system, its dynamic performance index is major test project that need to inspect and check on before shooting experiment.
现代武器均装备先进的火控系统，其动态性能指标是射击试验前需要检查和考核的主要试验项目。
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