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单词 solstice
释义 solstice
[`sälz·tǝs]
ASTRONOMY
The two days (actually, instants) during the year when the earth is so located in its orbit that the inclination (about 231/2°) of the polar axis is toward the sun; the days are June 21 for the North Pole and December 22 for the South Pole; because of leap years, the dates vary a little.
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