+9 = 13 

ㄉㆭˊtn̂g

  1. 消化器官消化吸收功能ㄨㄧ˫ㄉㆭˊuī‑tn̂g

  2. 度量ㄉㆦ˫ㄉㆭˊtōo‑tn̂g