1
a solar day + verb
常用于描述太阳日的基本时长。
A solar day lasts approximately 24 hours.
一个太阳日大约持续24小时。
太阳日
先理解核心含义，再看它在真实句子里的用法。
太阳日
One day of solar time; the time in which a planet such as Earth rotates once on its axis relative to the Sun, or the time between two successive moments when the Sun appears in the same place in the sky.
A solar day lasts approximately 24 hours.
一个太阳日大约持续24小时。
太阳日:一个太阳时；行星(如地球)相对于太阳自转一周的时间；太阳再次出现在天空同一位置所需的时间(地球上平均约24小时,但长度并非全年恒定)。
One day of solar time; the time in which a planet such as Earth apparently rotates once around its axis relative to the Sun; the time taken for the Sun to seem to be in the same place in the sky twice (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year)
A solar day on Earth is about 24 hours.
地球上的一个太阳日大约是24小时。
It takes one solar day for the sun to return to the same position in the sky.
太阳回到天空中同一位置需要一个太阳日。
The length of a solar day can change slightly over the year.
一年中太阳日的长度可能略有变化。
常用于描述太阳日的基本时长。
A solar day lasts approximately 24 hours.
一个太阳日大约持续24小时。
用于科学定义或特定语境中。
The solar day is the time between two successive transits of the Sun across the local meridian.
太阳日是太阳连续两次经过当地子午线之间的时间。
用作频率或比率单位。
The planet rotates once per solar day.
该行星每太阳日自转一次。
Not this
A sun day is 24 hours.
Use this
A solar day is 24 hours.
学习者可能将“太阳日”直译为“sun day”，但天文学标准术语是“solar day”，需使用形容词“solar”而非名词“sun”作定语。
Not this
It takes solar day to rotate once.
Use this
It takes a solar day to rotate once.
“solar day”是可数名词短语，在单数形式前必须加不定冠词“a”，否则句子缺少冠词，语法错误。
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通常用于天文学或日常时间计量，指从正午到下一个正午的24小时周期。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.