filter out

1.This metal net filters out the dirt.

这个金属网滤掉污物。

2.Filter out all the dirt before using the water.

用水以前先将其中不清洁的东西滤掉。

3.The news of his appointment filtered out before it was officially advertised.

他被任命的消息正式公布前就被漏出去。

4.Inserts at the lower cone bottom , filter out iron mixed with raw materials , optional madel available.

放入锥斗，滤掉残杂原料中的铁质物件。有多种结构形式以供选择。

5.An avocet has a long, strongly upcurved bill which contains a complex and highly specialized system of lamellae capable of filtering out small food items.

我找了一下网路上的资料，似乎也有讨论他嘴上弯原因的文献，可能有很久以前的，不就不太好找了。