Certain lessons have to be learned the hard way.

有些教训只有通过这种尴尬的方式才能吸取。

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When we avoid emotional pain, we are avoiding certain lessons for our growth.

当我们避开情感痛楚，我们是在逃避学习成长。

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The above-mentioned practice has certain lessons and guiding significance to similar projects.

对含水断层进行了准确预报，对类似工程具有一定的借鉴与指导意义。

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This human command and control center was awesome, and impressed within me certain lessons I have never forgotten, even though it has been 43 years since I passed through the trading room for the newsroom.

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Undoubtedly, there are certain eternal lessons about war, which could be seen as having a straight line from Korea, to Vietnam, to the Cold War and into Desert Storm.

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Thusly, learning real guitar playing from real musicians who are actually in bands on tour, adds a certain cache to the lessons on their site.

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