圆珠笔笔芯底端是透气的,上小学时,有一次班会,无比无聊,我便开始作死,无意中发现笔芯里面的油墨从底端用嘴吸一下,就会看起来多了一点(其实是因为被吸上去了,总量没有变),我顿时觉得开启了新世界的大门。心想这支笔永远都不会没墨了,我要申请专利!我发明了永动笔!沉浸在这样的情绪中,我一鼓作气把所有笔都吸了一遍。因为比较贪心,每只笔都吸到了顶端才罢休。吸的时候感觉嘴里 Ballpoint pen at the bottom is breathable, primary school, there will be a class meeting, very boring, I began to die, inadvertently found inside the ink cartridge from the bottom of the mouth to suck, it will look a little more In fact, because it was sucked up, the total did not change), I suddenly felt opened the door to a new world. I thought this pen will never have no ink, and I want to apply for a patent! I invented a permanent pen! Immersed in such emotions, I boasted all the pens are sucked again. Because more greedy, each pen sucked the top before giving up. When I feel my mouth