日常用品那些让人大开眼界的用途（组图）
<p>你有没有注意过衬衫后面有个小环？挂锁底部有个孔？这些有什么用意呢？还有为什么红酒瓶底有凹槽，圆珠笔尾部有小洞？书包上为什么有个“猪鼻子”？这些很容易被忽略的设计其实都有自己的大用途，一起来了解一下吧。</p><p><span word="You">You</span> <span word="may">may</span> <span word="have">have</span> <span word="seen">seen</span> <span word="some">some</span> <span word="of">of</span> <span word="these">these</span> <span word="details">details</span> <span word="and">and</span> <span word="wondered">wondered</span> <span word="what">what</span> <span word="they">they</span> <span word="were">were</span> <span word="for">for</span> - <span word="the">the</span> <span word="tiny">tiny</span> <span word="holes">holes</span> <span word="in">in</span> <span word="a">a</span> <span word="plane">plane</span> <span word="window">window</span> <span word="for">for</span> <span word="instance">instance</span>.</p><p>日常生活中你可能会注意到一些小细节并对它们的用途困惑不已——例如飞机窗户上的小洞。</p><p><span word="Others">Others</span> <span word="you">you</span> <span word="may">may</span> <span word="not">not</span> <span word="have">have</span> <span word="noticed">noticed</span> <span word="at">at</span> <span word="all">all</span> - <span word="like">like</span> <span word="the">the</span> <span word="tiny">tiny</span> <span word="hole">hole</span> <span word="on">on</span> <span word="the">the</span> <span word="base">base</span> <span word="of">of</span> <span word="a">a</span> <span word="padlock">padlock</span>.</p><p>还有些细节你压根就没发现——例如挂锁底下的小洞。</p><p><span word="But">But</span> <span word="all">all</span> <span word="of">of</span> <span word="them">them</span> <span word="have">have</span> <span word="important">important</span> <span word="functions">functions</span>, <span word="some">some</span> <span word="potentially">potentially</span> <span word="life">life</span>-<span word="saving">saving</span>.</p><p>但是这些小细节都有至关重要的作用，有些可能还可以救命。</p><p><span word="The">The</span> <span word="small">small</span> <span word="hole">hole</span> <span word="at">at</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="biro">biro</span> <span word="pen">pen</span>, <span word="for">for</span> <span word="example">example</span>, <span word="is">is</span> <span word="there">there</span> <span word="in">in</span> <span word="case">case</span> <span word="a">a</span> <span word="child">child</span> <span word="accidentally">accidentally</span> <span word="swallows">swallows</span> <span word="it">it</span>, <span word="to">to</span> <span word="provide">provide</span> <span word="an">an</span> <span word="air">air</span> <span word="hole">hole</span> <span word="so">so</span> <span word="they">they</span> <span word="can">can</span> <span word="still">still</span> <span word="breathe">breathe</span> <span word="with">with</span> <span word="it">it</span> <span word="lodged">lodged</span> <span word="in">in</span> <span word="the">the</span> <span word="throat">throat</span>; <span word="while">while</span> <span word="the">the</span> <span word="hole">hole</span> <span word="in">in</span> <span word="a">a</span> <span word="plane">plane</span> <span word="window">window</span> <span word="is">is</span> <span word="to">to</span> <span word="prevent">prevent</span> <span word="it">it</span> <span word="from">from</span> <span word="imploding">imploding</span> <span word="should">should</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="three">three</span> <span word="panes">panes</span> <span word="break">break</span>.</p><p>例如，圆珠笔尾部的小洞就是为了防止儿童不慎吞入窒息。当圆珠笔盖卡在喉咙的时候，儿童可以通过这个小小的透气孔来呼吸。而飞机窗户上小洞的用途在于，当飞机上三个窗格中的一个发生破裂时，它可以防止该窗户从内部爆裂。</p>
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