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什么是春分和秋分

What is an Equinox? 60 Second Science Questions for Children - FreeSchool

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每个春季和秋季 日历上都会标明春分和秋分
Every spring and every fall, the calendar marks the equinox –
你或许会问
and you may ask
什么是春分和秋分?
What is an equinox?
“equinox”这个词来源于两个拉丁词语
The word equinox comes from two Latin words
意思分别是“相等”和“夜晚”
that mean’equal’ and’night.’
在春分和秋分这一天
During an equinox the length of the day and the length of night
白天的长度和夜晚的长度几乎相等 都大约为12小时
are approximately the same, about 12 hours each.
因为地轴是倾斜的
Because the Earth’s axis is tilted,
所以在一年中 白天的时长有所变化
the length of a day changes during the course of a year,
在仲夏时 白天的时间最长
with the longest stretch of daylight in midsummer,
而在仲冬时 白天的时间最短
and the shortest day falling in midwinter.
在春分和秋分 将地球受阳光照射部分和阴影部分
During the equinox the line of Sun and shadow on the earth
划分为白天和黑夜的晨昏线径直穿越南北
dividing night from day runs directly north and south,
一年中只有春分和秋分才会这样
the only times in the year it will do so.
春分和秋分跟季节变化有直接的关系
Equinoxes are directly related to the changingof the seasons.
春分在三月份
The vernal equinox, in March,
标志着北半球春季的开始
marks the beginning of spring in the Northern Hemisphere
以及南半球秋季的开始
and the beginning of autumn in the Southern Hemisphere.
秋分在九月份
The autumnal equinox, in September,
标志着北半球秋季的开始
marks the beginning of fall in the Northern Hemisphere
以及南半球春季的开始
and the beginning of spring in the SouthernHemisphere.

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视频概述

春分秋分简介

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翻译译者

XC8849

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视频来源

https://www.youtube.com/watch?v=umPBE_sUvSc

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