___
--- is in 
is in  Ref. 許 [authorization]
is in  Ref. 設 [construct]
is in  Ref. 議 [discuss]
is in  Ref. 説 [explain]
is in  Ref. 訳 [interpret]
is in  Ref. 調 [investigate]
is in  Ref. 語 [language]
is in  Ref. 課 [lesson]
is in  Ref. 計 [measure]
is in  Ref. 証 [prove]
is in  Ref. 読 [read]
is in  Ref. 話 [talk]
is in  Ref. 試 [try]
is in  Ref. 記 [write down]