如果省略该属性,那么所有对应该索引的属性将被忽略。
If this property is omitted, then all properties for this index are ignored.
如果省略该属性,那么该组属性将被忽略。
If this property is omitted, the group of properties is ignored.
故意的省略是简单主义的基础:我们忽略一些东西是因为他们不是必须的,我们只需要保留我们需要的、要用的、或者喜爱的。
Intentional omission is the foundation of minimalism: we leave things out because they are unnecessary, and retain only what we need or use or love.
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