| 单词 | time-ball |
| 例句 | According to the official Times Square website, a time-ball was installed at the Royal Observatory in Greenwich, England, in 1833. The history behind the New Year's Eve ball drop ceremony 2021-12-31T05:00:00Z Telegraph Hill and its semaphore and time-ball were features of business life. A Backward Glance at Eighty Recollections & comment |
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