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<body>
  <div class="flip3D">
    <div class="back"><h3>grass</h3></div>
    <div class="front"><div class="chinese"><h1>草</h1></div><div class="pinyin"><h3>cǎo</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>forest</h3></div>
    <div class="front"><div class="chinese"><h1>森林</h1></div><div class="pinyin"><h3>sēn&thinsp;lín</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>flower</h3></div>
    <div class="front"><div class="chinese"><h1>花</h1></div><div class="pinyin"><h3>huā</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>fire</h3></div>
    <div class="front"><div class="chinese"><h1>火</h1></div><div class="pinyin"><h3>huǒ</h3></div></div>
  </div>

  <div class="flip3D">
    <div class="back"><h3>mountain</h3></div>
    <div class="front"><div class="chinese"><h1>山</h1></div><div class="pinyin"><h3>shān</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>leaf</h3></div>
    <div class="front"><div class="chinese"><h1>叶</h1></div><div class="pinyin"><h3>yè</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>lake</h3></div>
    <div class="front"><div class="chinese"><h1>湖</h1></div><div class="pinyin"><h3>hú</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>island</h3></div>
    <div class="front"><div class="chinese"><h1>岛</h1></div><div class="pinyin"><h3>dǎo</h3></div></div>
  </div>

  <div class="flip3D">
    <div class="back"><h3>tree</h3></div>
    <div class="front"><div class="chinese"><h1>树</h1></div><div class="pinyin"><h3>shù</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>stone</h3></div>
    <div class="front"><div class="chinese"><h1>石</h1></div><div class="pinyin"><h3>shí</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>sea</h3></div>
    <div class="front"><div class="chinese"><h1>海</h1></div><div class="pinyin"><h3>hǎi</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>river</h3></div>
    <div class="front"><div class="chinese"><h1>河</h1></div><div class="pinyin"><h3>hé</h3></div></div>
  </div>

  <div class="flip3D">
    <div class="back"><h3>wood</h3></div>
    <div class="front"><div class="chinese"><h1>木头</h1></div><div class="pinyin"><h3>mù&thinsp;tou</h3></div></div>
  </div>
  <div class="flip3D">
    <div class="back"><h3>water</h3></div>
    <div class="front"><div class="chinese"><h1>水</h1></div><div class="pinyin"><h3>shuǐ</h3></div></div>
  </div>

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