求翻译：　　1. 墙体收缩变形及板面裂缝：原因是竖向龙骨紧顶上下龙骨，没留伸缩量，超过2m长的墙体未做控制变形缝，造成墙面变形。隔墙周边应留3mm的空隙，这样可以减少因温度和湿度影响产生的变形和裂缝。是什么意思？

　　1. wall shrinkage deformation and cracks on slab surface: because under vertical joist tight on top of keel, no stroke, more than 2m of deformation joint in wall without control, resulting in deformation of walls. Partition should stay around the 3mm gap, which can reduce the temperature and humidity affect the resulting deformation and cracking.