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<b>take </b>
 <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> 
;<br/>

<b>thus </b><a NAME="E1:10_1_1"/>
 <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  is <a href="rewrite2.html#V1" title="REWRITE2:attr.1">XFinSequence-yielding</a>
 ;<br/>


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