只有当外部的类或对象需要访问其属性时，才使相应的getter或setter公有。
Only when an external class or object needs to access an attribute should you make the appropriate getter or setter public.
要有效地进行财务控制，必须使相应责任单位有十分明确的权责范围，即责任中心。
To effectively implement the financial control, every accountability unit should clearly know its responsibility bound, also known as the "responsibility center".
各密封件(10)配有推动件(11)，用于使相应的密封件(10)持续接触传送带(5)的边缘。
Each seal component (10) is equipped with a push component (11) for making corresponding seal component (10) continuously contact the edge of the conveyor belt (5).
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