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eight thousand and four hundred and seventy-nine eight thousand, four hundred, seventy-nine eight thousand, four hundred and seventy-nine eight thousands, four hundreds and seventy-nine
eight pounds twenty-five pence eight pounds twenty-five pennies eight pound twenty-five penny eight pound twenty-five cents
n（n∈Z） 2n（n∈Z）
2n或
（n∈Z） n或
（n∈Z）
weight：valid weather；value weight：value weather；valid
eight-year-old eight year old eight-years-old eight-year old
Weight Ton Measurement Ton Length Ton Gross Ton
a eight-day eight days an eight-days an eight days’
Smooth（平滑） Radius（半径） Height（高度）
weight designation viscosity index pour point thermal change value
weight；valid weather；value weight；value weather；valid
eighthours sleep eight hour’s sleep eighthourssleep eight hours’ sleep
n⊥β n∥β，或n⊂β n⊥α n∥α，或n⊂α
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