The Canvas API is a low level API for drawing. It lets you create lines, curves, polygons, and circles and fill them in with colors, gradients, and so on.
CanvasAPI是一个低级画图api，它支持创建直线、曲线、多边形和圆圈，并用彩色、渐变色等填充它们。
You can create a visible grid to aid in page layout using the guidelines feature of your page layout software or by drawing lines or boxes that you place on a non-printing layer of your publication.
你可以创建可见的网格来辅助页面排版：你的页面排版软件有辅助线的功能，或者你可以在非打印层绘制边线或方块。
By representing a building on an isometric grid, the drawing can present details in the foreground and background on a uniform plane, aligned to the parallel lines of the grid.
用一个正方形格子来表示建筑物，将前景与背景画在统一的平面上，依照格子的平行线排好。
The bearing wallboard in general on the drawing thin lines or dotted lightweight and simple label, for the materials of wall, blame main wall general thinner, only do partition wall to use.
一般的承重墙体在图纸上细线或散布轻和简单的标签，材料的墙，非承重墙一般较薄，只有做隔断墙用。
The bearing wallboard in general on the drawing thin lines or dotted lightweight and simple label, for the materials of wall, blame main wall general thinner, only do partition wall to use.
一般的承重墙体在图纸上细线或散布轻和简单的标签，材料的墙，非承重墙一般较薄，只有做隔断墙用。
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