事实上，不管我们的目视仪器有多么先进，我们所能够观察到的宇宙都有一个基本限度。
In fact there's a fundamental limit to how much of the universe we could ever observe, no matter how advanced our visual instruments.
这仪器是一个完整的电子收音机和目视检测，这些的使用方法都是十分简单。
This is a fully electronic audio and visual detecting system that is that is surprisingly easy to use.
颜色测量方法分为目视测色和仪器测色两大类，而仪器测色必须符合计量的标准。
Color measurement can be performed via visual method or physical one, the later must follow the corresponding metrological principle.
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