return interval

An interval of a year elapsed before we were able to return.

隔了一年我们才得以返回.

When measuring the surface of workpiece, the piezoelectric actuator drive focusing lens to move vertically to ensure that the focus is always on the surface of workpiece in every sample interval, and the focused signal error return to zero.

在测量工件表面形貌时.压电陶瓷驱动器驱动聚焦物镜进行垂直位移.从而确保在每一个采样间隔中焦点总是落在工件表面上，同时使得聚焦误差信号回零。

The software processing sound can open sound file saved in the form of oscillogram to let users find the number of crest and time of correspondence, and calculate out return interval, stoke interval and the percussive frequency.

声音处理软件以波形图的形式打开被保存的文件，使用户能够读出波峰数及相对应的时间，从而计算出冲、回程时间及频率。

But, after a decent interval, trade relations began to return to normal

但是适当地间断一段时间后，贸易关系开始恢复正常。