单词：solar year
solar year的用法和样例：
例句
- The tropical year is a phenomenon of the precession of the equinoxes in astronomy.太阳年是天文学里的岁差现象。
- A tropical year is a measurement of time from one winter solstice to the next.回归年是指从一年冬至到下一年冬至的时间段。
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