My understanding of this is that having meals has been transcending from a simple necessity to a kind of knowledge.
我的理解是现在的吃饭已经超越了简单的吃饭，而是成为了一门学问。
Everyone wears clothes. They can be a statement, a style, or a definition of who you are. They can also be a simple necessity.
人人都穿衣服，衣着可以展现个性，显示品味，定义性格，也可以只是为了满足基本的需求。
The face properties shown in the figure are intentionally simple, but you can see the flexibility the feature possesses — a necessity given many of the world's written languages.
该图中所显示的face属性都故意进行了简化，但是我们可以看到这种特性所提供的灵活性，这对于世界上很多手写语言来说都是必要的。
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