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.
我们可以在这里画一个箭头来指明该走哪条路。
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.
The proper way to draw a vector is to draw an arrow that's got a beginning and it's got an end.
画矢量的正确方法是,画一个有起点和终点的箭头
Then, you make an arrow corresponding to B and lay it on the end of this one.
再画一个表示 B 的箭头,把 B 放在 A 的终点
Now, you realize that... By the way, when you draw a vector like A, you're supposed to put a little arrow on top.
现在,大家应该发现...,顺便提一下,当你画了一个矢量,比如 A 时,上面要加个小箭头
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