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

The unsurpassed flexibility in filter composition allows high efficiency and uptime, even when you are producing a wide variety of products.

它在滤嘴复合中卓越的灵活性使生产能保持高效率与高设备使用率，即使是在生产多种规格产品时也是如此。

youdao

Bring a water bottle with a built-in filter to fill up at a drinking fountain after going through security. It saves money and keeps you hydrated and healthy.

携带一支带有内置过滤器的水瓶，你可以在通过安检之后在饮用水龙头处灌满它。这样既省钱又可以让你随时补充水分并且很健康。

youdao

The original design of the ceramic filter came from a chemist in Guatemala,Fernando Mazariegos.

VOA: special.2009.06.22

Ultimately, we need a filter or a lens to talk about then what is ultimately in control.

最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。

普林斯顿公开课 - 人性课程节选

In simple terms, think of snow or ice as a filter.

VOA: special.2010.01.05

Light-emitting chemicals used in the filter help scientists measure how many bacteria are bound onto the antibodies.

BBC: Speedy 'burger bug' test

Thanks to some impressive Click-style crowd-sourcing, we have a slightly better idea of whether or not we really are all living in the filter bubble.

BBC: Click listeners test 'filter bubble'

Numi now packs organic tea in biodegradable filter paper.

FORBES: UPSVoice: From Tuna To Tea, 'Greenwrapping' Makes Food Sustainable Beyond Ingredients