1
filter out sth
We need to filter out all the noise.
我们需要过滤掉所有噪音。
滤出；过滤掉
先理解核心含义，再看它在真实句子里的用法。
滤出；过滤掉
to remove or separate something unwanted from a substance or group by passing it through a filter or using a similar process
We need to filter out all the noise.
我们需要过滤掉所有噪音。
过滤掉
To selectively remove part of something.
逐渐传出
To come out gradually (e.g. news).
filter out
Base
原形
filters out
3rd person
第三人称单数
filtering out
-ing
现在分词
filtered out
Past
过去式
filtered out
Past participle
过去分词
The machine filters out impurities.
这台机器滤出杂质。
Yesterday, she filtered out the noise.
昨天，她滤出了噪音。
We have filtered out all errors.
我们已经滤出了所有错误。
滤出
The water filter removes most impurities, but it cannot filter out all the tiny bacteria.
这个滤水器能去除大部分杂质，但无法过滤掉所有微小的细菌。
You should filter out the coffee grounds before pouring the drink.
倒饮料之前，你应该先把咖啡渣过滤掉。
My phone screen filters out blue light to protect my eyes.
我的手机屏幕会过滤掉蓝光以保护眼睛。
We need to filter out all the noise.
我们需要过滤掉所有噪音。
The software filters out spam from your inbox.
该软件从收件箱中过滤掉垃圾邮件。
常用于被动语态，表示被剔除。
Any irrelevant data are filtered out.
任何无关数据都会被过滤掉。
Not this
We should filter spam emails.
Use this
We should filter out spam emails.
中文的“过滤”可以表示剔除，但英文短语动词 filter out 必须包含 out 才能表达“去除”的含义。缺少 out 会使句子意思不完整或改变为“过滤（但可能不剔除）”。
Not this
Spam emails should be filtered before reading.
Use this
Spam emails should be filtered out before reading.
在被动语态中，filter out 必须整体保留，out 是短语动词的固定部分，表示“被去除”。遗漏 out 会导致句子含义变为“被过滤”（不一定被去掉），不符合原意。
Choose the next layer that will help you use filter out with more confidence.
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use filter out naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.