n.毡头笔，水笔 （油墨）毡笔

水彩笔；毡笔

felt pens───毡笔

fell pony───费尔小型马

fell upon───开始行动，进攻

felt-tip pen───毡尖笔

ball pen───[轻]圆珠笔

bull pen───公牛栏

fell in───排队；到期

fell on───落到

felt for───同情；摸索

Turn old, orphan socks into cute puppets by simply sticking buttons for eyes and using a felt pen to draw other features.───把旧的，单只的袜子做成可爱的玩偶。只需要把末端粘在一起做出眼睛，并用水彩笔画出其他的特征就可以了。

Using a felt pen, place a small mark where the left and right seat tubes should be situated.───使用一个笔尖，放置一个小标志在左，右座管应该设。

Use different colours of felt pen on your sketch to avoid confusion .───用不同颜色的毡头笔画草图，以免搞混。

I solved the problem by adapting a red felt pen.

Use different colours of felt pen on your sketch to avoid confusion.