春节期间，手里难免沾上油烟、糖霜或者护手霜，手机镜头大概率是蒙着一层油污的。带着油污去拍照，所有的灯光都会变成乱七八糟的眩光，画面也是雾蒙蒙的，再精通后期也救不回来。所以，在掏出手机准备记录美好瞬间之前，先用衣服下摆或者纸巾，用力地、仔细地把镜头擦干净。
Roud then ventures a theory of his own: the custom, he argues, probably developed from a children’s game called Tig-touch-wood that was popular in early 19th century England.，更多细节参见safew官方版本下载
Should I use multiple Wi-Fi extenders?，推荐阅读safew官方下载获取更多信息
Helps users improve vocabulary
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