| 1. | The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces .
作者证实：单叶双曲面和双曲抛物面是直线曲面。 |
| 2. | The third kind of solar oven is a parabolic cooker
第三种太阳灶是抛物面式炊具。 |
| 3. | The third kind of solar oven is a parabolic cooker
第三种太阳灶是抛物面式太阳灶。 |
| 4. | The third kind of solar oven is a parabolic cooker
第三种太阳能烤箱是抛物面炊具。 |
| 5. | The third kind of solar oven is a parabolic cooker
第三类是太阳炉抛物面炉。 |
| 6. | The third kind of solar oven is a parabolic cooker
第三种太阳能炉子式抛物面形炉灶。 |
| 7. | The third kind of solar oven is a parabolic cooker
第三种太阳能烤炉是抛物面式烹饪机。 |
| 8. | Food cooks quickly in parabolic ovens
在抛物面形炉灶里食物会熟得很快。 |
| 9. | Food cooks quickly in parabolic ovens
在抛物面式炊具里食物会熟得很快。 |
| 10. | Food cooks quickly in parabolic ovens
抛物面式烹饪机烹煮食物很快。 |
