新华社 虹马鱼能否加入三文鱼团队，近日引发国内舆论广泛关注。那么，三文鱼和虹马鱼在国外是如何界定的呢？有什么区别吗？如何监督管理？新华社对此在欧美日进行了调查。
I am wondering if there is a way to do this using Core Animation. Specifically, I am adding a sub-layer to a layer-backed custom NSView and setting its delegate to another custom NSView. That class\'s
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