A sidereal day be shorter than a mean solar day by 3 minute and 56 second
恒星日比平均太阳日短三分五十六秒
A sidereal day is shorter than a mean solar day by 3 minutes and 56 seconds.
恒星日比平均太阳日短三分五十六秒。
mechanism of solar mean hydromagnetic dynamo
太阳平均磁流发电机机制
a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers).
用来计算太阳系内距离的单位；等于地球到太阳的平均距离。
Otherwise the daily mean is perturbed appreciably by the lunar constituents.
否则，日平均值就会明显地受到太阳分潮的干扰。
Study on Average Daily-efficiency Experiments of Solar Water Heating System with All-glass Evacuated Tubes
全玻璃真空管型太阳热水系统平均日效率的试验
Already the sun had slipped beyond the horizon.
太阳已经落下了地平线。
The sun dipped below the horizon.
太阳落到地平线下了。
The sun had cleared the horizon.
太阳已经升出了地平线。
The sun was-ging towards the horizon.
太阳向地平线下降。
The sun was just kissing the horizon.
太阳刚刚染红地平线。
The sun has risen above the horizon.
太阳已从地平线升起。
Greenwich hour angle mean sun
格林尼治平太阳时角
The sun dips below the sea.
太阳沉入海平面以下。
The sun appeared on the horizon.
太阳在地平线上出现。
The sun appears on the horizon.
太阳出现在地平线上。
The sun has set below the horizon.
太阳已落于地平线下。
solar energy flat plate collector
平板式太阳能收集器