Mégara時間からZhongshan時間への変換
+7
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+6
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+5
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+2.5
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+2
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+1.5
+1
+0.5
+0
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+0
+0
+0
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+0
+0
-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-6
-7
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-10