It can be useful to filter out external stimuli if you are writing an email in a noisy coffee shop, for example, or are searching for a camouflaged insect in a rainforest.

例如，要是你在在嘈杂的咖啡馆里写一封电子邮件或在雨林里搜寻一只伪装的昆虫，能过滤掉外部的刺激就很有用。

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This provides the flexibility to assign any logging level to any class filter without external restrictions.

这允许灵活地为任何类过滤器分配任意的日志级别，而不存在外部限制。

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This is possible using algorithms that filter out interference caused by external electrical activity.

能滤除外部电活动致干扰的算法使之成为可能。

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This is possible using algorithms that filter out interference caused by external electrical activity.

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