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daylight saving time
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daylight saving time
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daylight saving time
夏令时
为了节约能源,夏季人为将时间调快一小时。也叫夏时制,夏时令,又称日光节约时制或夏令时间。
Astronomy
daylight saving time
缩写:DST。夏令时
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symplectic connection
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