1.
chronometer time plus watch time
天文钟时间加钟表时间
2.
chronometer time minus watch time
天文钟时间减钟表时间
3.
mean solar chronometer
天文钟(指示平时的
4.
pivoted detent escapement
枢轴式天文钟擒纵机构
5.
bascule escapement
锁轴式天文钟擒纵机构
6.
spring detent escapement
锁簧式天文钟擒纵机构
7.
Su Song over800 years ago, was the first of its kind in the world.
中国科学家苏颂800多年前发明的天文钟是世界上最早的天文钟。
8.
chronometer, marine,key-wound
航海天文钟,用钥匙上发条驱动
9.
chronometer, marine, battery, quartz or mains powered
航海天文钟,原电池、石英或用交流电源驱动
10.
Using water power and having all the functions of the armillary sphere, it was the first astronomical clock in the world.
以水为动力，集浑仪、浑象、报时装置于一体，是世界上最早的天文钟。
11.
The H maser's day stability reaches 2E-15/day at Shanghai Astronomical Observatory
上海天文台主动型氢原子钟的天稳好于2E-15
12.
This clock loses two minutes a day.
这钟一天慢两分钟。
13.
This clock loses two minutes (ie becomes two minutes behind the correct time) a day.
这钟一天慢两分钟.
14.
The clock gains three minutes a day.
这座钟每天快3分钟。
15.
The clock gains one minute a day.
这座钟一天快一分钟。
16.
Officials from Greenwich OBservatory have the clock checked twice a day.
格林威治天文台的高级职员每天把大钟校对两次。
17.
What time tomorrow evening?"
明天晚上几点钟？”
18.
The Hong Kong Time Standard is provided by a caesium beam atomicclock. Accuracy within fractions of a microsecond a day is maintained.
天文台利用铯原子钟，提供香港的时间标准，该钟误差每日不超过一微秒。