filter

1. V-T To filter a substance means to pass it through a device which is designed to remove certain particles contained in it. 過濾

The best prevention for cholera is to boil or filter water, and eat only well-cooked food. 預防霍亂最好的方法是把水煮沸或過濾，竝且衹喫煮熟的食物。

2. V-I If light or sound filters into a place, it comes in weakly or slowly, either through a partly covered opening, or from a long distance away. (光、聲) 透入

Light filtered into my kitchen through the soft, green shade of the honey locust tree. 光線透過皂莢樹柔和的綠廕照進了我的廚房。

3. V-I When news or information filters through to people, it gradually reaches them. (新聞、信息等) 逐漸傳開

It took months before the findings began to filter through to the politicians. 幾個月後調查結果才開始逐漸傳到政治家們那裡。

News of the attack quickly filtered through the college. 襲擊的消息很快就在這所大學傳開了。

4. N-COUNT A filter is a device through which a substance is passed when it is being filtered. 過濾器

...a paper coffee filter. …一張咖啡濾紙。

5. N-COUNT A filter is a device through which sound or light is passed and which blocks or reduces particular sound or light frequencies. 濾聲器; 濾光器

You might use a yellow filter to improve the clarity of a hazy horizon. 你可以用一個黃色濾光器來提高模糊的地平線的清晰度。