&spancss=&ot;ntext_kw12&ot;>&/span>道&spancss=&ot;ntext_kw20&ot;>&/span>炼&spancss=&ot;ntext_kw0&ot;>&/span>越往&spancss=&ot;ntext_kw16&ot;>&/span>越困难&spancss=&ot;ntext_kw0&ot;>&/span>&spancss=&ot;ntext_kw20&ot;>&/span>炼耗费&spancss=&ot;ntext_kw1&ot;>&/span>时间和资源也越多&spancss=&ot;ntext_kw4&ot;>&/span>&/p>
&spancss=&ot;ntext_kw2&ot;>&/span>般&spancss=&ot;ntext_kw12&ot;>&/span>&spancss=&ot;ntext_kw17&ot;>&/span>&spancss=&ot;ntext_kw0&ot;>&/span>从&spancss=&ot;ntext_kw12&ot;>&/span>&spancss=&ot;nt