我问过WWDC期间的一些工程师，他们是否知道这个问题。答案：是的。事实上，在类型子系统中存在一些问题。他们可能在某天做一个修复，但现在，剩下要做的是顺序化所有的文本布局。 ：（

I've asked some of the engineers during WWDC whether they know the issue. The answer: YES. And there are in fact some problems in the type subsystem. They might be doing a fix some day, but for now all that is left to do is to sequentialize all text layout. :(

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