sub-filter

常见例句

• I had to sub for the referee, who was sick.
  裁判病了，我得代为裁判。
• You need to filter the drinking water.
  你需要把饮用水过滤。
• A filter traps dust from the air.
  过滤网可存住空气中的尘埃。
• The news of the defeat started to filter through.
  战败的消息开始传出来。
• It won't take long to filter the coffee.
  用不了多少时间就可以把咖啡过滤好。
• I took this picture with a red filter.
  这张照片我是用红色滤光镜拍摄的。
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