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| lesson | |||
| lesson (A unit of learning that addresses a portion of the content for a class and may include assignments, materials, and other lessons) | |||
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lecon : 42 a las frases, 12 temas |
| Aviación | 1 |
| Ciencias de la tierra | 1 |
| Educación | 5 |
| Esgrima | 1 |
| Estudios culturales | 1 |
| Finanzas | 1 |
| General | 25 |
| Gimnasia | 2 |
| Microsoft | 1 |
| Nadar | 1 |
| Nombre de la organización | 1 |
| Patentes | 2 |