This method is still in research because signal pick-up and procession is difficult. In addition, the lack of experiment data and flexibility inspection system is another reason.

该方法的国内外研究水平尚未成熟，目前面临的主要问题是测量信号提取与处理困难，缺乏足够的实验数据，测量系统缺乏灵活性以及信号处理方法不完善。

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Clinton served up another course of dainty presidential tapas, like overhauling the nation's meat-inspection system and cracking down on truants.

CNN: It's My Party And I'll Run If I Want To