| 51. | achieve [find] the maximum of efficiency with the minimum of labour |
| 以最少的劳动取得最高的效率
|
| 52. | efficiency in production |
| 生产效率
|
| 53. | efficiency promotion |
| 效率的提高
|
| 54. | a certificate of efficiency |
| 工作能力（优良）鉴定书
|
| 55. | award credits to employees for efficiency of service |
| 表彰雇员的服务效率
|
| 56. | a high degree of efficiency |
| 高效率
|
| 57. | develop the equipment to a high pitch of efficiency |
| 把设备的效率发挥到很高的程度
|
| 58. | an endurance [ efficiency ] test |
| 耐力[效能]测试
|
| 59. | efficiency factor |
| 有效因子，效率
|
| 60. | efficiency wage |
| 效率工资
|