画一个箭头，每一行转换参数，根据关键点。

Draw an arrow, each line transformed according to keypoint parameters.

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我们可以在这里画一个箭头来指明该走哪条路。

We can paint an arrow here to indicate the right way.

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轻松地画一条有箭头或没箭头的线把一个想法和另一个关联起来。

Simply draw a line with or without an arrow linking one thought to another.

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轻松地画一条有箭头或没箭头的线把一个想法和另一个关联起来。

Simply draw a line with or without an arrow linking one thought to another.

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