单词	concentric
释义	concentricconcentric /kənˈsɛntrɪk/ adjective Etymology ETYMOLOGYconcentric Origin: 1300-1400 Medieval Latin concentricus, from Latin com- ( ➔ COM-) + centrum center math, geometry concentric circles have their centers at the same point → eccentric
随便看	substantively substation substitute substitute teacher substitution substitution effect substrate substratum substructure subsume subsurface mining subtenancy subtenant subtend subterfuge subterranean subtext subtitle subtitled subtle subtlety subtly subtotal subtract subtraction

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