编程时用户只要输入初始频率和增量值和增量的次数以及各频率分量保持时间间隔。
To program the device, the user enters the start frequency, the increment step size, the number of increments to be made and the time interval the part stays at each frequency.
重要的是，不论注意力还是行为，一旦以一个特定的方向开始了，就会在一个相当长的时间间隔中保持在那个方向上。
It is important that both attention and behavior, once initiated in a particular direction, tend to persist in that direction for a considerable time interval.
获取或设置服务在关闭之前保持非活动状态的时间间隔。
Gets or sets an interval of time that a service can remain inactive before closing.
获取或设置消息块或完整消息在发出之前可以在内存中保持缓冲的最大时间间隔。
Gets or sets the maximum interval of time that a chunk of a message or a full message can remain buffered in memory before being sent out.
为了保持这种时间间隔的相等，说话或朗读时，就得采用各种方法来调整。
When speaking or reading, varied methods are to be taken in order to keep such equal intervals.
使用方法：洁面后，将眼膜取出沿眼睑紧贴肌肤，15 - 20分钟取下，每次使用间隔时间保持在2 -3天内。
Usage: After facial cleaning, take out the eye mask, apply it onto eyelid for 15-20 minutes. Use it once every 2-3 days.
使用方法：洁面后，将眼膜取出沿眼睑紧贴肌肤，15 - 20分钟取下，每次使用间隔时间保持在2 -3天内。
Usage: After facial cleaning, take out the eye mask, apply it onto eyelid for 15-20 minutes. Use it once every 2-3 days.
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