It can be designed and built for certain circumstance and production capability such as number of processing skewers or length of the conveyor within a production line.
它可以设计和建造某些情况以及生产能力等多项处理串或长度的输送生产线。
In fact, under certain circumstances they may be less safe because related individuals or friends may not wish to expose a circumstance that makes them unsuitable for donation.
事实上，在某些情况下，这种方式可能更不安全，因为相关的亲友可能不愿意坦白他们不适合献血的事实。
The program supports the user by offering default values for inputs and by disabling controls that are unreasonable in that circumstance while maintaining configuration freedom at a certain degree.
软件具有一定的自由配置能力，支持用户进行缺省值输入，并且使控件在某些情况下不能被激活。
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