衡量单位
最后修正 2023-11-22 15:29:08
衡量单位
4
ID
UnitRef
248
BaseQuantity
time
符号
d-dup1
SymbolFr
j-dup1
SymbolCn
SymbolPlural
d
SymbolFrPlural
j
SymbolCnPlural
天
Unit
day
UnitFr
jour
UnitCn
IsoClass
-1
AcceptPlural
-1
Value
86400
87
Category
PHYSICAL
小注
SI base units: The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.
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