Good maintenance practices and periodic testing of the insulation should be the rule rather than the exception.

良好的保养和定期的绝缘检测应成为制度而不是偶尔为之。

youdao

In appropriate cases, periodic testing of the different batches prepared from the same lot of dehydrated medium is acceptable.

在适当的情况下，用同一个批次的脱水培养基配制的不同批次的定期试验是可以接受的。

youdao

There is an electrical preventive maintenance task assigned to the Ground Fault Circuit Interrupter, that requires periodic testing of the unit.

应指定接地故障断路器的电气预防维护任务，此项任务要求对装置进行定期测试。

youdao

There's no mandated periodic testing to see if the user is really staying off these dangerous chemicals.

FORBES: PERNICIOUS PROPOSITION

The answer remains obvious: Periodic testing remains desirable.

CENTERFORSECURITYPOLICY: Nukes: Test Them or Lose Them

And as age changes the physical condition and interactions of weapons' components and materials, the probability will increase that -- without a renewal of periodic testing -- such defects will increase in severity and number.

CENTERFORSECURITYPOLICY: A credible nuclear deterrent