Sofia時間からSingapore時間への変換
20:52:59
+5
01:52:59
+7
+7
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+5
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+2
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+1
+0.5
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-6
-7
-7
-7
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-10