The paper considers that "four principles" should be insisted, "four relations" should be handled well and "four basic works" should be strengthened so as to fulfill innovation.

文章认为，要实现创造性工作，必须坚持“四个原则”、处理好“四个关系”、抓好“四项基础工作”。

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The system works by displaying four panels on the screen at a time, such as basic needs, activities, food and toys.

这款程序通过在屏幕上一次显示4个菜单，这4个菜单分别是基本需要、活动、食物和玩具。

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The system works by displaying four panels on the screen at a time, such as basic needs, activities, food and toys.

这款程序通过在屏幕上一次显示4个菜单，这4个菜单分别是基本需要、活动、食物和玩具。

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