| 51. | the angle of elevation |
| 仰角
|
| 52. | an angle of reflection |
| 反射角
|
| 53. | decide the magnitude of an angle |
| 确定一个角的大小
|
| 54. | measurement of angle |
| 测角，角度测量
|
| 55. | invisible from this angle |
| 从这个角度看不见的
|
| 56. | treat the problem from an entirely new angle |
| 从全新的角度处理这一问题
|
| 57. | the complement of an angle |
| 余角
|
| 58. | angle [fish] for compliments |
| （贬）故意引别人说恭维话
|
| 59. | an angle of ninety degrees |
| 90度的角
|
| 60. | study from every angle |
| 从各个角度来研究
|