First... create these 3 curves (fig 19), or download this step 1 file (Right-Click Save-As), if you open this file you will have 3 curves : 1 straight curve and 3 circle curves (fig 19)

开始...创建3条曲线(fig 19),又或者在下里下载(点击右键另存为),如果你打这个文件，你将得到3条曲线: 1条笔直的曲线和3条画圈(fig 19).

OK first step, select all these curves, then select edit curves > intersect curves, you will have these 6 intersect areas, it means this operation will cut these intersect areas (fig 20). Next select back all of these curves then go to edit curves > cut curves. Now you will see some areas has been removed autmatically (fig 21)

第一步，选择所有的曲线，使用edit curves > intersect curves命令,你将在这些范围得到这6个相交点，这意味着我们将这这里剪切它们(fig 20).现在选择所有曲线并使用 edit curves > cut curves命令.现在你可以看到这些相交点自动的移动到相应位置.

But if you select them one-by-one (individualy), some of these curves are still connected (fig 22). We don't want it, cause for this operation, we need to separate all of the intersected curves.
OK now select back all these curves then go to edit curves > cut curves again, this time all of the areas has been cutted out (fig 23), ahhh...OK...this is whats we need to start.

如果最初你是一条一条的选择这些曲线，那么其中的一些曲线仍然是连接着的(fig 22).我们不想这要，我们需要分离所有的相交点.
好,再次选择所有曲线,再次使用 edit curves > cut curves,这次在所有的相交点都产生了剪切(fig 23).OK,这就是我们想要的结果.

Now select these curves (fig 24), and delete them (fig 25), now you have correct intersected areas, but they're still separated curves, we need to attach all of them right?. You cannot just select all these curves and attach them together.

现在选择这些我们不需要的曲线(fig 24),并将它们删除(fig 25).现在我们得到正确的相交区域,但是它们依然是分离的曲线,我们需要将它们以正确的方式连接起来.你不可以选择所有的曲线然后连接它们在一起，这是不对的.

OK now select these 2 curves (straightcurve first then the circle one) (fig 26), then go to edit curves > attach curves > option box and apply these settings (fig 27), these settings means we'll use connect curve attach method and remove unnecessary multiple knots.

现在选择这两条曲线(直线和其中一条弧线)(fig 26), 使用 edit curves > attach curves > option box 命令并使用这个设置选项(fig 27),这些设置表示我们用连接的方式并将不需要的插入新的相交点.