| 单词 | zone-clock |
| 释义 | > as lemmaszone-clock zone-clock n. ΚΠ 1795 W. Herschel in Philos. Trans. (Royal Soc.) 85 398 It would not only be trouble~some to the workman, but often bring on mistakes, were he to count the turns of the handle, which perhaps for hours together he is moving; a zone-clock, therefore, has been contrived to release him from that care... It strikes a bell..when the telescope is come to one of the limits of the zone. < as lemmas |
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