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词汇
time-keeping
释义
time-keeping
COCA²⁰⁶⁸⁸⁰BNC⁵⁸⁵⁸⁹
基本
例句
n.
计时;记时;🌏守时;维持时间;时间保持
A miniature hydrogen maser standard for time-keeping has been developed successfully at Shanghai Observatory.
本文报告了一种守时用小型氢原子钟的设计和研制。
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更新时间:2026/9/28 3:04:02