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51. | dated securities |
| 定期证券 |
|
|
| |
52. | see each other regularly |
| 定期约会 |
|
|
| |
53. | routine adjustment |
| 定期调整 |
|
|
| |
54. | periodic blow down |
| 定期排污 |
|
|
| |
55. | schedule maintenance |
| 定期维护 |
|
|
| |
56. | regular premium |
| 定期保费 |
|
|
| |
57. | scheduled aircraft |
| 定期班机 |
|
|
| |
58. | planned disposal |
| 定期销毁 |
|
|
| |
59. | routine observation |
| 定期观察 |
|
|
| |
60. | periodic elections |
| 定期选举 |
|
|
| |