其含义是，类应该从外界获得配置(更多的注入)，生命周期状态变换同样也应该从外部进行控制。
The implication is that classes should be given their configuration (more injection) and lifecycle state-changes similarly controlled from outside.
系统必须处理三类外部实体：生产线上的称重机、工人的控制台、审计日志。
The system must deal with three classes of external entities: the weighing machines on the production lines, the worker's console, and the audit log.
在忽略摩擦力和外部扰动情况下，设计了一大类综合的自适应控制策略，能保证系统全局的渐近稳定；
In the absence of friction and disturbances, a new class of globally asymptotically stable adaptive control strategies are proposed.
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