1·For underwater acoustic positioning system based on measurement of time_delay, range ambiguity appears when pulse's propagating time is longer than its repetition period.
基于时延测量的水声跟踪定位系统，当信号传播时延大于脉冲重复周期时，就会出现距离模糊。
2·At present stage in China, tourism in rural areas is one for leisure, with the characteristics of short period, short trip, low consumption and repetition.
我国现阶段乡村旅游属于休闲旅游，有短时、短途、低消费、重复的特征。
3·In contrast to traditional shipbuilding mode, this method can sharply lower the rate of repetition and material wasting in pipe design and arrangement period.
该方法与传统造船模式相比，可大大降低管系设计与布置中的返工率和管材浪费。
4·Oxide film in the expected tone of such color can be obtained by controlling current density, square—wave cycle period and number of the repetition cycles.
通过调节电流密度，方波周期和通电次数等可获得预期色调的着色膜。
5·Partly repetition in legal system education contents in college period and in junior and senior middle school periods.
在借鉴国外学校德育成熟经验的基础上，提出了我国学校在小学、初中、高中、大学各阶段法制教育的系统内容。