symmetry
n.
1560s, "relation of parts, proportion," from Middle French symmétrie (16c.) and directly from Latin symmetria, from Greek symmetria "agreement in dimensions, due proportion, arrangement," from symmetros "having a common measure, even, proportionate," from assimilated form of syn- "together" (see syn-) + metron "meter" (see meter, n.2). Meaning "harmonic arrangement of parts" first recorded 1590s.
〔李〕[sym-（syn-）=with与；metry=measure尺度⇒“a measure along with the other与另一尺度一致的尺度”→] n.a balance or harmony between parts对称，匀称