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| 变分学法 | |||
| 变分法 | |||
| 变分学 (法) | |||
| 变分学 | |||
| 变分计算 | |||
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| 变分法 | |||
| 变分学 | |||
| calculus of variations: 4 phrases in 1 subject |
| Technology | 4 |
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