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11. | Time after time;now and then. |
| 一次又一次地;不时 |
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12. | on occasion |
| 有时,不时 |
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13. | The World Trade Center, a soaring symbol of New York City and the nation, illustrates this point. |
| 最好的例子莫过于巍然耸立的世贸中心。 |
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14. | standing timber; many buildings were still standing. |
| 笔直的木材;许多建筑仍然耸立在那。 |
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15. | Unconfirmed reports now and then |
| 不时传闻 |
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16. | every now and then [ again ] |
| 常常, 不时地 |
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17. | at intervals |
| 不时,时时 |
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18. | from time to time |
| 有时,不时 |
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19. | now and then |
| 时而,不时 |
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20. | from time to time ;now and then;occasionally |
| 不时;偶尔;间或. |
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