<span class="pun">.</span><span class="pln">all IE</span><span class="pun">{</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value\9</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">gte IE </span><span class="lit">8</span><span class="pun">{</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value\0</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">lte IE </span><span class="lit">7</span><span class="pun">{*</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">IE </span><span class="lit">8</span><span class="pun">/</span><span class="lit">9</span><span class="pun">{</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value\0</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">IE </span><span class="lit">9</span><span class="pun">{</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value\9\0</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">IE </span><span class="lit">7</span><span class="pun">{+</span><span class="pln">property</span><span class="pun">:</span><span class="pln">value</span><span class="pun">;}</span>
<span class="pun">.</span><span class="pln">IE </span><span class="lit">6</span><span class="pun">{</span><span class="pln">_property</span><span class="pun">:</span><span class="pln">value</span><span class="pun">;}</span>
<span class="pun">.</span><span class="kwd">not</span><span class="pln"> IE</span><span class="pun">{</span><span class="pln">property</span><span class="com">//:value;}</span>
lte：Less than or equal to 的简写，也就是小于或等于的意思。
lt ：Less than 的简写，也就是小于的意思。
gte：Greater than or equal to 的简写，也就是大于或等于的意思。
gt ：Greater than 的简写，也就是大于的意思。
! ?：不等于的意思，跟 javascript 里的不等于判断符相同
