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二至点 èrzhìdiǎn
space solstice (冬至和夏至); solstitial point
tech. solstice (即夏至点和冬至点); solstitial point (即夏至点和冬至点)
二至点夏至点和冬至点 èrzhìdiǎn
agric. solstices; solstitial point