When you commit to doing something every single day without exception, you can't rationalize or justify missing a day, nor can you promise to make it up later by reshuffling your schedule.
当你发誓要每天都要毫无例外地做某一件事时，你就没法理所当然地错过某一天，或是承诺改天再通过修改日程表把它补回来。
You shall be free indeed when your days are not without a care nor your nights without a want and a grief.
当你们的白昼并非无忧无虑，你们的夜晚并非没有希望和悲伤，你们是自由的。
Although you could model all your data without attributes, they can be a very intuitive choice for data items which are known in advance to never repeat (per element) nor have any sub-fields.
虽然不用属性也可以对所有数据进行建模，但是对于预先知道不会重复(对于每个元素而言)，也没有任何子字段的数据项，使用属性仍是最直观的选择。
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