ide·og·ra·phy /ˌɪdiˈɑgrəfi, ˌaɪ-/
  表意文字研究,表意文字使用
  I·de·og·ra·phy n. The representation of ideas independently of sounds, or in an ideographic manner, as sometimes is done in shorthand writing, etc.
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  ideography
       n : the use of ideograms in writing