集中练习。持续无间断的不超过90分钟的短周期练习，然后再休息。
Practice intensely, without interruption for short periods of no longer than 90 minutes and then take a break.
因腹水增加引起的腹胀，可能只通过皮带尺寸的变化被测知，而且可能随着周期性摄入酒精而间断变化。
Abdominal distention, due to the development of ascites, may be detected only by a change in belt size, and it may be intermittent, related to cyclic alcohol intake.
VD精炼炉的真空抽气泵工作时蒸汽压力稳定而流量具有周期性，间断使用。
The pressure of the steam used in the vacuum pump of VD refining furnace is stable, but its flow is periodic.
本实用新型结构设计合理，磁控管能够在一个周期内不间断的输出微波，充分利用电能，缩短加热时间。
The utility model has reasonable structure, and the magnetron can constantly send out the microwave at one period, therefore, the electricity is fully used and the heating time is shortened.
也许“震荡”一词并不准确，因为它们的设计是低频震荡，而且周期是间断性的。
Perhaps the term "vibrating" is not quite accurate since they are designed for low frequency vibration and the vibration cycle is intermittent.
也许“震荡”一词并不准确，因为它们的设计是低频震荡，而且周期是间断性的。
Perhaps the term "vibrating" is not quite accurate since they are designed for low frequency vibration and the vibration cycle is intermittent.
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