pen造句
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。
Draw the basic outlines in black felt-tip
pen (see fig. 4).
用黑色毡头笔画出基本轮廓（见图4）。
He sat behind a desk laboriously writing with an Army issue
pen.
他坐在书桌后吃力地写着，用的是一支部队发的钢笔。