All text strings in filter files should be in single, or double quotes. However, for convenience sake, quotes can be omitted under certain circumstances.

所有过滤文件中的文本字符串应该在单引号或者双引号内。可是，为了方便的缘故，引号在一定的情况下可以被忽略。

youdao

You can specify that you are only interested in XPath results by using the double colon in the filter.

可以通过在过滤器中使用两个冒号来指定您只想获得XPath结果。

youdao

The transmission characteristics of all_fiber filter composed of double fiber directional couplers were studied.

分析了由双光纤定向耦合器组成的梳状滤波器的透射特性。

youdao

The Muppets have, in many of their incarnations, sustained a certain amount of double entendre, and this documentary-style glimpse behind the scenes doesn't remove the gauzy filter in any way.

CNN: Review: 'The Muppets' still finding its felting