夏日防晒表达汇总
<p>夏天来了，可以穿着美美的比基尼去海滩晒太阳了！不过，晒太阳可不等于在阳光下毫无遮挡地暴晒哦！</p><p>过度暴露在日光下（<span word="overexposure">overexposure</span> <span word="to">to</span> <span word="the">the</span> <span word="sun">sun</span>'<span word="s">s</span> <span word="rays">rays</span>）会增加患黑色素瘤（<span word="develop">develop</span> <span word="melanoma">melanoma</span>）的风险，这是最致命的一种皮肤癌（<span word="skin">skin</span> <span word="cancer">cancer</span>）。</p><p>夏天紫外线强。紫外线辐射（<span word="UV">UV</span> <span word="radiation">radiation</span>）主要包含两种射线：</p><p>波长较长的<span word="UVA">UVA</span>（长波黑斑效应紫外线）可以穿透皮肤导致细胞损伤，就是它害你胶原（<span word="collagen">collagen</span> [ˈ<span word="k">k</span>ɒ<span word="l">l</span>ə<span word="d">d</span>ʒə<span word="n">n</span>]）流失，皮肤变老的。</p><p><span word="Ultraviolet">Ultraviolet</span> <span word="A">A</span> (<span word="UVA">UVA</span>) <span word="rays">rays</span> <span word="will">will</span> <span word="tan">tan</span> <span word="and">and</span> <span word="age">age</span> <span word="skin">skin</span>.</p><p>而波长较短的<span word="UVB">UVB</span>（中波红斑效应紫外线）则影响皮肤表层，主要会导致皮肤发红（<span word="reddening">reddening</span>）和晒伤（<span word="sunburn">sunburn</span>）。</p><p><span word="Ultraviolet">Ultraviolet</span> <span word="B">B</span> (<span word="UVB">UVB</span>) <span word="radiation">radiation</span> <span word="is">is</span> <span word="the">the</span> <span word="chief">chief</span> <span word="cause">cause</span> <span word="of">of</span> <span word="sunburn">sunburn</span> <span word="and">and</span> <span word="contributes">contributes</span> <span word="to">to</span> <span word="skin">skin</span> <span word="cancer">cancer</span>. </p><p>关于紫外线</p><p><span word="UV">UV</span>（<span word="ultraviolet">ultraviolet</span>） 紫外线</p><p><span word="ultraviolet">ultraviolet</span> <span word="radiation">radiation</span> 紫外线辐射</p><p><span word="UVA">UVA</span>（<span word="Ultraviolet">Ultraviolet</span> <span word="A">A</span>）长波紫外线<span word="A">A</span>，长波黑斑效应紫外线</p><p><span word="UVB">UVB</span>（<span word="Ultraviolet">Ultraviolet</span> <span word="B">B</span>）中波紫外线<span word="B">B</span>，中波红斑效应紫外线</p><p>防晒产品上常见的<span word="PA">PA</span>(<span word="Protection">Protection</span> <span word="UVA">UVA</span>) 是表示防止皮肤被晒老化的数值，即防止<span word="UVA">UVA</span>到何种程度的指标。</p><p>防晒产品标识</p><p><span word="PA">PA</span>(<span word="Protection">Protection</span> <span word="UVA">UVA</span>) <span word="UVA">UVA</span>保护数值</p><p><span word="PA">PA</span>值代表有效防护的时间：</p>
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