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1·Tropical year, and sidereal year are two different concepts.

回归年与恒星年是不同的两个概念。

2·Tropical year , and sidereal year are two different concepts .

在即回归年与恒星年是不同的两个概念。

3·During a tropical year the sun moves from Vernal Equinox to Vernal Equinox.

在一个回归年内，太阳从春分点转回到春分点。

4·Applying tropical year and lunation, the exchange formula of calendar and solar calendar could be derived.

以回归年和朔望月为基础，推导出阴、阳历日期换算公式。

5·Applying tropical year and lunation, the exchange formula of lunar calendar and solar calendar could be derived.

以回归年和朔望月为基础，推导出阴、阳历日期换算公式。

6·The Julian calendar approximated the mean tropical year as 365.25 days and proposed 366-day leap years for every one divisible by four.

儒略历将太阳年划为365.25天，闰年366天，每四年一次。

7·This paper advocates that the six states of the dragon described in the hexagram of Qian are six celestial phenomena of the star of the green dragon in a tropical year.

本文认为乾卦六爻爻辞所说的“六龙”各种状态是苍龙星在一个回归年中所运动的不同天象。

8·Properly speaking, tropical rainforests grow in high-rainfall equatorial areas that remain wet or humid all year round.

准确地说，热带雨林生长在高降雨量的赤道地区，这些地区全年保持湿润。

9·Cuba has a tropical climate with year-round sunshine.

古巴属于热带气候，终年阳光明媚。《柯林斯英汉双解大词典》

10·It says tropical storms formerly claimed dozens, if not hundreds of lives, each year in Cuba.

据说以前热带风暴每年在古巴造成的死亡人数，没有几百人也有数十人。