盐和糖的保质期，远比你想象的长
<p><span word="Many">Many</span> <span word="of">of</span> <span word="the">the</span> <span word="foods">foods</span> <span word="that">that</span> <span word="last">last</span> <span word="for">for</span> <span word="a">a</span> <span word="long">long</span> <span word="time">time</span> <span word="are">are</span> <span word="high">high</span> <span word="in">in</span> <span word="sugar">sugar</span> <span word="and">and</span> <span word="salt">salt</span>.</p><p>很多保质期很长的食物都含有很多糖和盐。</p><p><span word="In">In</span> <span word="simple">simple</span> <span word="terms">terms</span>, <span word="they">they</span> <span word="draw">draw</span> <span word="water">water</span> <span word="out">out</span>, <span word="so">so</span> <span word="if">if</span> <span word="bacteria">bacteria</span> <span word="try">try</span> <span word="to">to</span> <span word="grow">grow</span> <span word="on">on</span> <span word="it">it</span>, <span word="they">they</span> <span word="will">will</span> <span word="simply">simply</span> <span word="shrivel">shrivel</span> <span word="up">up</span>.</p><p>简单讲，这是因为它们能把水分吸出来，所以如果细菌尝试在上面生长就会失水变干。</p>
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