mean time
成語所屬單字meantime
mean time — 慣用語
1. a standard for measuring time based on the average motion of the sun across the
1.慣用語
釋義
平太陽時
a standard for measuring time based on the average motion of the sun across the sky, used in astronomy and as the basis for civil time zones such as Greenwich Mean Time (GMT).
例句
When the clock at the Greenwich Observatory shows noon (Greenwich Mean Time), it is already 8 p.m. in Singapore.
Before GPS existed, sailors used Greenwich Mean Time to figure out how far east or west they had sailed.