This fact may be obfuscated by our simple example earlier in which the polymorphic recursion occurs as a simple, directself-reference.
我们先前的简单示例(其中，多态递归作为一个简单直接的自引用发生)会使这一事实变得模糊。
2
Just running or drooning around day after day filled with anxiety, stress and a low sense of self expressed in all kinds of direct or indirect ways ain't no fun.
整天漫无目的地跑来跑去，承受着来自各个方面的焦虑、压力和薄弱的自我表达感，可不是什么好玩的。
3
Brad Fick of Direct Source, which sells self-service technology, says NFC devices will be introduced in the next year or two. For retailers that last until then, that is good news.
Direct Source公司的Brad Fick销售自助服务技术，他认为NFC设备将在明年或后年得到应用，对能坚持到那时候的零售商而言，这是个好消息。