Switching to diaphragmatic breathing takes concentrated practice.

转变为横隔膜呼吸需要全神贯注的练习。

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For example, it was a long-standing practice among local farmers to dig what they called zai—shallow pits that collected and concentrated scarce rainfall onto the roots of crops.

举例来说，在长期实践中，当地农夫发明了一种方法：挖掘出浅地坑种植农作物，这种被当地人称作“zai”的浅地坑同时也可以收集与存储稀少的雨水以灌溉农作物。

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Somewhere along the way, we lost the essential practice of concentrated rest.

一路走来，我们失去了专注休息的重要能力。

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It takes time, practice, and concentrated efforts to make it the best it can be.

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In practice, a combination of economics and geography means that much of its infrastructure is concentrated in a comparatively small number of places.

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