If you forget to mention a prefix in any step, your expression will return nothing-an error for which it's difficult to track the cause.

如果有任何一个步骤忘记使用这个前缀，那么表达式不会返回任何内容，并且很难搞清楚究竟是哪一步出的错。

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Finally, in my experience, the error messages you get when there's a configuration problem tend to be obscure, making it difficult to track down the cause.

最后，以我的经验，当有一个配置问题时，您捕获的错误消息往往是模糊不清的，而追踪原因也很困难。

youdao

The 4090 type dynamic mechanical track scale, mostly used at home, is taken as an example to analyze the error produced in its weighing in motion through calculation of balancing time.

并以国内使用较多的4090型机械动态轨道衡为例，通过平衡时间的计算，分析其动态称量误差。

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