It should run for a week in normal use before its battery needs recharging.
在日常使用中能运行一周而不用充电。
Design classes so that an exception is never thrown in normal use.
类的设计应使在正常使用中从不引发异常。
NOTE 2 Failure of basic insulation is not considered likely to occur in normal use.
注2：不考虑在正常使用中可能发生的基本绝缘失效。
NOTE 2 Failure of basic insulation is not considered likely to occur in normal use.
注2：不考虑在正常使用中可能发生的基本绝缘失效。
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