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phenomenon
As shown, the adaptive line width div, the average width of the two originally div, wherein since a single line of text exceeds the interior, resulting in longer width.
Solution
Use table layout elements within div fit its layout. To set the table-layout not only on table, but also inherit the parent's width width settings
<div> <!-- 自适应的div-->
<table style="table-layout:fixed;width: -webkit-fill-available;">
<tr>
<td>需要换行的文字</td>
</tr>
</table>
</div>