| 51. | a low grade of intelligence |
| 低智力
|
| 52. | people of a lower social grade |
| 社会地位较低的人
|
| 53. | pay grade |
| （军人）薪金等级
|
| 54. | a poor grade of tea |
| 低级茶叶
|
| 55. | students of the senior [junior] grade |
| （中、小学）高［低］年级学生
|
| 56. | an institution of university grade |
| 一所大学程度的学校
|
| 57. | be on the up grade |
| 走上坡路，在兴盛中
|
| 58. | a pupil in the third grade |
| 三年级学生
|
| 59. | organic glass with a high grade of transparency |
| 高透明度的有机玻璃
|
| 60. | grade down |
| 降级;降到较低类别
|