concentric

US /kənˈsɛntrɪk/

UK /kənˈsentrɪk/

C1 高級
adj.形容詞同中心的
A circle is concentric because it is an object that shares the same center with one inside the other

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如果下週五人類滅絕了怎麼辦?| 灰色地帶 (What if humans went extinct next Friday? | The Gray Area)

57:53如果下週五人類滅絕了怎麼辦?| 灰色地帶 (What if humans went extinct next Friday? | The Gray Area)