| 1. | The airplane must be guided, or steered, so that it will not only go left or right, but also up or down .
飞机必须被制导，即被驾驶，使它不仅可向左或向右而且也可向上或向下飞行。 |
| 2. | An ascending or descending part ; an incline
斜面向上或向下倾斜的部分；斜坡 |
| 3. | Lets you move up or down based on your needs
允许根据需求向上或向下移动。 |
| 4. | If necessary , you can scroll the page up or down
如有必要，可以向上或向下滚动页面。 |
| 5. | Event occurs only when you click the up or down arrows
仅当单击向上或向下箭头时才发生 |
| 6. | How to : page up or down in memory
>如何：在内存中向上或向下翻页 |
| 7. | To move up or down one instruction
向上或向下移动一个指令 |
| 8. | To page up or down in memory
在内存中向上或向下翻页 |
| 9. | Up or down
向上或向下 |
| 10. | Property sets the amount that the number is adjusted by when the user clicks an up or down arrow
属性设置用户单击向上或向下箭头时数字的调整量。 |
