<form>
  <div>
    <label for="box1">チェックボックス1</label>
    <input type="checkbox" id="box1" />
  </div>
  <div>
    <label for="box2">チェックボックス2</label>
    <input type="checkbox" id="box2" checked />
  </div>
</form>
* {
  text-align:center;
}

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