For example, we do not validate that length is a positive number big enough for a meaningful ruler or that the file specified is a valid image file type for ImageMagick.
例如，对于长度是不是对一个有意义的标尺足够大的正数值，或者指定的文件是不是ImageMagick的有效图像文件类型，我们没有进行验证。
If you need to implement critical validation logic, such as ensuring that a deposit into a bank account is always positive, then a valid place to consider putting that logic is in the setter.
如果需要实现关键确认逻辑(例如确保银行帐户的存款始终是正数)，则考虑将该逻辑放置在setter这个有效场所。
A reflection from the second Sun is normally proof positive of a valid capture, but there are indications this second reflection is a ghost.
第二个太阳的反射通常是有效捕捉的铁证，但是有显示说明这个第二次反射是个幻影。
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