The class specified by the domain validator extension must, directly or indirectly, extend the abstract DomainValidator class to be properly used by the validator framework.

域确认器所指定的类必须直接或间接地扩展抽象的domainvalidator类，以让确认器框架适当地使用它。

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Equipment such as freezers, refrigerators, etc. that are used to hold components or dietary supplements must be functioning properly and adequately designed.

冷冻机，冰箱保存组分或膳食补充剂等设备必须有适当的功能，设计足够。

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Cane probes are used to provide overfill detection where a permanent sensor cannot be properly affixed to a tank or rail car.

在永久性溢出探头无法适当固定在储罐或铁路槽车上的情况下，可用杆式探头来进行过量灌装的检测。

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And as I understand it, the reason Kathleen made this decision was she could not be confident that a 10-year-old or an 11-year-old go into a drugstore, should be able -- alongside bubble gum or batteries -- be able to buy a medication that potentially, if not used properly, could end up having an adverse effect.

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Used properly, these formulas can be an acid test to help a worker judge whether his or her retirement savings plan is on track.

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