| 1. | Radio waves travel in straight lines .
无线电波是直线传播的。 |
| 2. | In a uniform medium light travels in straight lines .
在均匀介质中光沿直线传播。 |
| 3. | Early in life we learn that light travels in straight lines .
早先在生活中我们就知道光是直线传播的。 |
| 4. | These high-frequency shout waves are only able to travel in straight paths from the transmitter .
这些高频短波从发射机发出后只能从直线传播。 |
| 5. | It is clear that light travels in straight lines
很明显，光是沿直线传播的。 |
| 6. | This conforms to the light straight line dissemination rule
这符合光的直线传播规律。 |
| 7. | Diffraction is the bending of light around an obstacle
当光遇到障碍物时，光偏离直线传播的现象。 |
| 8. | Light straight - line propagation and imagery quality from light diffraction
从光的衍射看光的直线传播及像质问题 |
| 9. | It is because light t ravels in st raight linesthat an object cast s shadow
11是因为光以直线传播,物体才有阴影。 |
| 10. | Light travels in straight lines , which explains why shadows are formed when it goes past an object
光以直线传播，这说明光经过物体时形成阴影的原因。 |
