Fix the description of line height (#311)

Fix #299.

index.html

@@ -1063,9 +1063,9 @@ <h4>
             <p its-locale-filter-list="zh-hant" lang="zh-hant">版心的行距多半介於文字尺寸的50%–100%之間，當行長較短或文字尺寸較小時，行距設定也會相對較小。反之，行距一般不會超過文字尺寸，就算超過文字尺寸，也不會因而增加易讀性。</p>
           </div>
           <div class="note" id="n010">
-            <p its-locale-filter-list="en" lang="en">There is another method of specifying the type area that uses line height rather than line gaps. <dfn id="endef_lineHeight">Line height</dfn> is the distance between two adjacent lines measured from their reference points. The reference point differs from implementation to implementation. However, in vertical writing mode, the horizontal center of the character frame is usually used, and with horizontal writing mode, the vertical center of the character frame is used. When the character size is the same for every character, the following calculation is used:</p>
-            <p its-locale-filter-list="zh-hans" lang="zh-hans">指定版心的方法中，有着不以行距，而是依行高来设定的方法。行高就是彼此邻接的两行之基准点间的距离。基准点依照处理方式而会有所不同，直排时为行左右的中央线，横排时为行上下的中央线。当配置的文字全部尺寸相同时，有着以下关系：</p>
-            <p its-locale-filter-list="zh-hant" lang="zh-hant">指定版心的方法中，有著不以行距，而是依行高來設定的方法。行高就是彼此鄰接的兩行之基準點間的距離。基準點依照處理方式而會有所不同，直排時為行左右的中央線，橫排時為行上下的中央線。當配置的文字全部尺寸相同時，有著以下關係：</p>
+            <p its-locale-filter-list="en" lang="en">There is another method of specifying the type area that uses line height rather than line gaps. <dfn id="endef_lineHeight">Line height</dfn> is the distance between two adjacent lines measured from their reference points. The reference point differs from implementation to implementation. For example, in vertical writing mode, the horizontal center of the character frame can be used, and in horizontal writing mode, the vertical center of the character frame can be used. When the character size is the same for every character, the following calculation is used:</p>
+            <p its-locale-filter-list="zh-hans" lang="zh-hans">指定版心的方法中，有着不以行距，而是依行高来设定的方法。行高就是彼此邻接的两行之基准点间的距离。基准点依照处理方式而会有所不同。比如，在直排时可以行左右的中央线为基准点，横排时可以行上下的中央线为基准点。当配置的文字全部尺寸相同时，有着以下关系：</p>
+            <p its-locale-filter-list="zh-hant" lang="zh-hant">指定版心的方法中，有著不以行距，而是依行高來設定的方法。行高就是彼此鄰接的兩行之基準點間的距離。基準點依照處理方式而會有所不同。比如，在直排時可以行左右的中央線為基準點，橫排時可以行上下的中央線為基準點。當配置的文字全部尺寸相同時，有著以下關係：</p>
             <ul>
               <li id="id54">
                 <p its-locale-filter-list="en" lang="en">line height = character size / 2 + line gap + character size / 2 = character size + line gap</p>