Warning notices must be readily understandable.

　　警告性標示必須明白易懂。

　　Roger Neuberg writes in a simple and understandable way.

　　羅杰·紐伯格的作品簡單易懂。

　　The general response was one of understandable bafflement.

　　一般的反應是，一次可以理解的受挫。