They are characterized by longer period, higher sensitivity, multiple recording range, good stability, compact and small size.
其特点是周期长，灵敏度高，多量程，稳定性好，结构紧凑，体积小。
Since multiple files are created during each recording and execution, it becomes very difficult to handle multiple dialogs.
由于每次记录与执行中都会新建多种文件，这使得处理多重会话变得十分困难。
The invention of roll film greatly speeded up the process of recording multiple images.
这项胶卷的发明极大的推动了可记录的多重画面技术的进程。
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