,千萬不 能坐下來休息,因?yàn)榈孛娴亩趸紳舛雀?div id="m50uktp" class="box-center"> 。由于以上原因
,所以森林中的氧氣白天比晚上多?div style="height: 300px; display: flex; justify-content: center; align-items: center; max-width:600px; text-align: center; font-weight: bolder; box-shadow: 0 1px 8px #666;background-size: 50px 50px;background-color: #ffffde;background-image: -webkit-linear-gradient(45deg ,rgba(255,255,255,.2) 50%,transparent 50%,transparent);background-image: linear-gradient(45deg ,rgba(255,255,255,.2) 50%,transparent 50%,transparent); margin-left: auto; margin-right: auto;">