| 单词 | second-pendulum |
| 释义 | > as lemmassecond-pendulum second-pendulum n. = seconds pendulum n. ΚΠ 1765 P. Murdoch in Philos. Trans. 1764 (Royal Soc.) 54 31 A second-pendulum at the equator would be 39·154 inches long. < as lemmas |
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