In fact, to learn with success is not a very difficult task if you follow some basic rules.

事实上，如果你遵循一些基本的规则，成功地学习并不是一件非常困难的事情。

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He explained our basic task, the tractor fired up and we were off, riding down the field looking for weeds to spray with chemicals.

他向我们解释了我们的主要工作：拖拉机发动起来，我们就出发，沿着田野寻找可以喷洒化学药剂的杂草。

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The basic task that we have as astronomers studying galaxies is trying to classify them and divide them into their basic categories, which have been with us almost a century.

NPR: What Makes Our Solar System Special?

The simple view is that medicine exists to fight death and disease, and that is, of course, its most basic task.

NEWYORKER: Letting Go

It's a shame that such an expensive camera with high-def output comes with such a low-def approach to the basic task of composing the image.

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