In a social system structure, the system includes the formal system and the informal one.
在一个社会的制度结构中，制度包括正式制度和非正式制度。
The system test environment is a carefully controlled formal test environment.
系统测试环境是精心控制的正式测试环境。
The system test environment is a carefully controlled formal test environment.
系统测试环境是精心控制的正式测试环境。
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