高二作文：Air Around Us
<p> <span word="Air">Air</span> <span word="is">is</span> <span word="around">around</span> <span word="us">us</span>. <span word="We">We</span> <span word="can">can</span> <span word="not">not</span> <span word="see">see</span> <span word="it">it</span>, <span word="smell">smell</span> <span word="it">it</span>, <span word="or">or</span> <span word="taste">taste</span> <span word="it">it</span>. <span word="But">But</span> <span word="we">we</span> <span word="can">can</span> <span word="feel">feel</span> <span word="the">the</span> <span word="wind">wind</span> <span word="blow">blow</span>. <span word="We">We</span> <span word="can">can</span> <span word="see">see</span> <span word="the">the</span> <span word="wind">wind</span> <span word="move">move</span> <span word="waves">waves</span> <span word="on">on</span> <span word="the">the</span> <span word="water">water</span>, <span word="clouds">clouds</span> <span word="in">in</span> <span word="the">the</span> <span word="sky">sky</span>, <span word="and">and</span> <span word="tree">tree</span> <span word="branches">branches</span>. <span word="Wind">Wind</span> <span word="is">is</span> <span word="moving">moving</span> <span word="air">air</span>.</p><p> <span word="Without">Without</span> <span word="air">air</span> <span word="we">we</span> <span word="could">could</span> <span word="not">not</span> <span word="breathe">breathe</span>. <span word="There">There</span> <span word="could">could</span> <span word="be">be</span> <span word="no">no</span> <span word="living">living</span> <span word="plants">plants</span> <span word="or">or</span> <span word="animals">animals</span>. <span word="Because">Because</span> <span word="sound">sound</span> <span word="travels">travels</span> <span word="through">through</span> <span word="air">air</span>, <span word="without">without</span> <span word="air">air</span> <span word="there">there</span> <span word="would">would</span> <span word="be">be</span> <span word="silence">silence</span>. <span word="The">The</span> <span word="movement">movement</span> <span word="of">of</span> <span word="air">air</span> <span word="can">can</span> <span word="support">support</span> <span word="a">a</span> <span word="large">large</span>, <span word="heavy">heavy</span> <span word="plane">plane</span>.</p><p> <span word="Air">Air</span> <span word="is">is</span> <span word="a">a</span> <span word="mixture">mixture</span> <span word="of">of</span> <span word="gases">gases</span> <span word="and">and</span> <span word="water">water</span> <span word="vapor">vapor</span>. <span word="The">The</span> <span word="most">most</span> <span word="important">important</span> <span word="gases">gases</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span> <span word="are">are</span> <span word="nitrogen">nitrogen</span> <span word="and">and</span> <span word="oxygen">oxygen</span>. 78 <span word="percent">percent</span> <span word="of">of</span> <span word="the">the</span> <span word="air">air</span> <span word="is">is</span> <span word="made">made</span> <span word="up">up</span> <span word="of">of</span> <span word="nitrogen">nitrogen</span>, <span word="and">and</span> <span word="about">about</span> 21 <span word="percent">percent</span> <span word="of">of</span> <span word="oxygen">oxygen</span>. <span word="Almost">Almost</span> <span word="all">all</span> <span word="living">living</span> <span word="things">things</span> <span word="use">use</span> <span word="the">the</span> <span word="oxygen">oxygen</span> <span word="in">in</span> <span word="air">air</span>. <span word="Fire">Fire</span> <span word="cannot">cannot</span> <span word="burn">burn</span> <span word="without">without</span> <span word="oxygen">oxygen</span>.</p>
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