求翻译：3地面不平，出现小高低：砖的厚度不一致，没严格挑选，或砖面不平劈棱窜角，或铺贴时没敲平、敲实，或上人太多养护不利。造成为解决此，问题首先要选好砖，不合规格，不标准的砖一定不能用。铺贴时要砸实，铺好地面后，封闭入口，常温48小时锯末养护后方可上人操作。是什么意思？

3 surface uneven, appear small high and low: brick thickness of inconsistencies, not a rigorous selection process, split Prism channeling or brick surface roughness angle, or paving didn't knock, knock real, or too many people on conservation adversely. Cause for this, issue first to select the right tiles, substandard, not standard bricks must not be used. Paving to hit real when, after paved ground, closed entrances, sawdust 48 hours curing at room temperature until human actions.