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... e necessary factors for derivation.
However, ideal is ideal, reality is reality, and there are too many uncertain factors in reality.
For example, experiments designed in the laboratory may not work outside the laboratory.
On paper, an ideal environment without friction can be assumed, but in reality this ideal is almost impossible to achieve.
Then, in the matter of \"preaching\", what is the reality like?
In fact, it is also simple, just two words \"benefits\" ...
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