And just like writing with a pen, you can use a flashlight or penlight to create "drawings" in the air and photograph them.
就如同用笔写字，你也可以用手电筒或笔形电筒在空气中“绘画”，并把你画的图拍摄下来。
And just like writing with a pen, you can use a flashlight or penlight to create "drawings" in the air and photograph them.
就如同用笔写字，你也可以用手电筒或笔形电筒在空气中“绘画”，并把你画的图拍摄下来。
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