1.
The equation of time, which transforms the true solar time into a mean uniform time, the so-called mean solar time.
时差，将真太阳时转换为平时，即平太阳时。
2.
Greenwich hour angle mean sun
格林尼治平太阳时角
3.
acceleration of sidereal on mean solar time
平太阳时换算恒星时的增量
4.
The sun was just above the horizon when we set out.
我们出发的时候太阳刚刚露出地平线。
5.
the time in the evening at which the sun begins to fall below the horizon.
傍晚太阳从地平线上消失的时候。
6.
When the sun sets it goes below the horizon.
太阳下山时它落在地平线下面。
7.
When the sun sets, it drops below the west horizon.
日落时，太阳就落到西方地平线的下面。
8.
The sun was on the horizon when we set off.
我们出发时, 太阳正在地平线上。
9.
The tropical year is the interval between two transits of the mean Sun through the mean Equinox.
回归年是平太阳两次通过平春分点的时间间隔。
10.
The best opportunity to see both rainbows is when the sun is at the horizon.
看虹和霓的最好时机是当太阳在地平时。
11.
As the sun drew near the horizon, he repaired to the rock.
当太阳西沉，快接近地平线时，他就向礁石靠近。
12.
It was within half an hour of sunset when we entered the first wood; and a little after sunset, when we came into the plain.
我们走进第一片树林时，离开太阳落下去只有半小时了；等到我们进入那片平地，太阳已经下去了。
13.
Already the sun had slipped beyond the horizon.
太阳已经落下了地平线。
14.
The sun dipped below the horizon.
太阳落到地平线下了。
15.
The sun had cleared the horizon.
太阳已经升出了地平线。
16.
The sun was-ging towards the horizon.
太阳向地平线下降。
17.
The sun was just kissing the horizon.
太阳刚刚染红地平线。
18.
The sun has risen above the horizon.
太阳已从地平线升起。