Eventually these were superseded by "small clock", or French, hours, which split the day into two 12-hour periods commencing at midnight.

最终，这些被“小钟”——即法语中说的小时取代了，它把一天分成两个12小时的时间段，从午夜开始。

youdao

Days refers to 24-hour periods, not calendar days.

天指的是24小时的阶段，不是日历日。

youdao

The amount of radiation was equal to using a mobile phone for two half-hour periods per day.

辐射的总量相当于每天使用手机打两次半个小时的电话。

youdao

"To our complete surprise, we found several red dwarf binaries with orbital periods significantly shorter than the 5-hour cut-off found for sun-like stars, something previously thought to be impossible, " the study's lead author Bas Nefs, from Leiden Observatory in the Netherlands, said in a statement.

MSN: 'Impossible' stars found in our galaxy - Technology & science - Space - Space.com | NBC News

There were periods of the game, especially in the first half hour, where the hosts enjoyed the majority of the possession and appeared comfortable against the young Brazil side.

BBC: Nigeria coach Christian Chukwu

Up to 24 trains an hour will operate in the central section between Paddington and Whitechapel during peak periods, with each train able to carry 1, 500 passengers.

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