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好几百万年
释义
DEFINITIVE EXAMPLES 权威例句〔pre-exist〕Dinosaurs pre-existed human beings by many millions of years.恐龙先于人类好几百万年前就存在了。剑桥高阶
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uniaxially oriented polymer
unibasal
unibi
unibody
unibody
unibus
unibus computer
unibus selector
unibus structure
unibus system
unicameral
unicameral
unicameral
unicameral
unicameral system
unicameralism
unicameralism
unicamerate
unicapsular
unicard
unicarinated
unicarpellate
unicast
unicast process
unicef
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更新时间:2026/3/26 15:08:37