It's easy to write on this white strip using an ordinary ballpoint pen, pencil, or felt-tip marker.
可以很容易地用一般圆珠笔，铅笔，或毡尖在这条白色标记带上做标记。
Though making a ballpoint pen may seem straightforward, producing a tiny tip with fluent writing effects requires over 20 processes.
制造一支圆珠笔看似简单，但生产出一个顺滑好写的笔头却需要经历20道工序。
A ballpoint pen has a 1 metal ball at its 2 tip.
原子笔的笔尖有一颗金属球。
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