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不规则四边形
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不规则四边形
Physics
trapezium
①梯形 ②不规则四边形
trapezoid
①不规则四边形 ②梯形
Mathematics
trapezium
梯形,不规则四边形
trapezoid
梯形
†
,不规则四边形;梯形的
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ussuri tachinid fly
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U.S.-Taiwan Mutual Defense Treaty
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usual absolute value
usual basis
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