来自MSN3 个月
The clocks that take 2.5 hours to wind back
When British Summer Time (BST) ends each year, the collections officer at a Victorian country house in Cornwall prepares herself for a busy day at work. At Lanhydrock, near Bodmin, which is run by ...
BBC2 年
The 12 and 24 hour clock
A clock with hands (an analogue clock) shows us the numbers 1-12. There are 24 hours in one day, so we measure time by splitting the day into two halves. The first 12 hours of the day, from ...