| 1 | This formula is applicable to relatively static systems. | |
| 2 | He found that this formula could simplify the calculation process. | |
| 3 | This calculation formula is very simple, you can try it yourself. | |
| 4 | In math class, the teacher taught us how to derive formulas. | |
| 5 | We need to add a mathematical symbol in this formula. |
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