diff --git a/1000-hours/sounds-of-american-english/2.2.2-pb.md b/1000-hours/sounds-of-american-english/2.2.2-pb.md
index d247c220..a357ce3e 100644
--- a/1000-hours/sounds-of-american-english/2.2.2-pb.md
+++ b/1000-hours/sounds-of-american-english/2.2.2-pb.md
@@ -14,8 +14,6 @@ Chinese students often struggle to distinguish between *please* and *police* at
 
 * *please* 只有一个音节：<span class="pho alt">pliːz</span><span class="speak-word-inline" data-audio-us-male="/audios/us/please-us-male.mp3" data-audio-us-female="/audios/us/please-us-female.mp3"></span>，而 *police* 有两个音节： <span class="pho alt">pəˈliːs</span><span class="speak-word-inline" data-audio-us-male="/audios/us/police-us-male.mp3" data-audio-us-female="/audios/us/police-us-female.mp3"></span>；
 * *please* consists of a single syllable: <span class="pho alt">pliːz</span><span class="speak-word-inline" data-audio-us-male="/audios/us/please-us-male.mp3" data-audio-us-female="/audios/us/please-us-female.mp3"></span>, while *police* has two syllables: <span class="pho alt">pəˈliːs</span><span class="speak-word-inline" data-audio-us-male="/audios/us/police-us-male.mp3" data-audio-us-female="/audios/us/police-us-female.mp3"></span>.
-* *please* 之中 <span class="pho">iː</span> 是长元音，而 *police* 之中 <span class="pho">`ɪ`</span> 是短元音。
-* In the word *please*, the <span class="pho">iː</span> is a long vowel, while in the word *police*, the <span class="pho">ɪ</span> is a short one.
 * 前者末尾的辅音是 <span class="pho">z</span>，后者末尾的辅音是 <span class="pho">s</span>；
 * The final consonant in *please* is a <span class="pho">z</span> sound, whereas in *police*, it's an <span class="pho">s</span> sound.
 * 最关键的，前者开头最多听起来是 <span class="pho">pʊ</span>，而后者不一样，是 <span class="pho">p</span> 和另外一个元音构成的音节： <span class="pho">pə</span>……