In the process of data collection, it will be affected by the environment, usage, etc., resulting in the collected data cannot be directly processed as an ideal sample
In the process of data acquisition, it will be affected by environment, usage and so on, resulting in the collected data can not be treated directly as an ideal sample
In the process of data collection, it will be affected by the environment, usage and other aspects, resulting in the collected data can not be directly processed as an ideal sample<br>