中心双实线 zhōngxīnshuāngshíxiàn double solid center lines Origin Definitions Defs Strokes Stroke Words Sentences Sents 中心 zhōngxīn noun center The middle part of something; the heart, core, or hub of a place or activity.双 雙 shuāng numeraladjective two Two; both; dual; twin; double; twofold实线 實線 shíxiàn solid line A continuous line drawn without breaks or gaps