The answer is simple: whenever you need to do something that takes a long time.
答案很简单：需要完成耗时的任务的任何时候。
Happiness is really very simple: someone love; Have something to do; Looking forward to.
幸福其实真的很简单：有人爱；有事做；有所期待。
We do not need to become technical to explain something that is very simple.
我们不需要用什么技术词汇来解释很简单的问题。
Repeat simple things, you are expert; repeat something hard to do, you are the winner.
简单的事重复做，你就是专家；重复的事用心做，你就是赢家。
When I want my dog to do something, I give her simple, one-syllable commands.
在我想让我的狗做一些事的时候，我给它下达简单的一个音节的命令。
When I want my dog to do something, I give her simple, one-syllable commands.
在我想让我的狗做一些事的时候，我给它下达简单的一个音节的命令。
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