Be proficient in the use of drawing tools.

掌握绘图工具的运用.

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Mathematical drawing tools to draw mathematical code, many functions. But there are some run - time error.

数学画图工具数学画图代码, 功能很多. 不过运行时有一些错误.

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With over 200 of drawing tools, filters 33,33 variants, 23 of animation and other tools!

拥有超过200种绘图工具 、 33种滤镜、33种变型 、 23种其它和动画工具!

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The pencil should be hold tightly the holding position should be higher than drawing tools.

手握笔的位置要比用仪器绘图时高些,以利运笔和观察目标.

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