Definitions should not be more difficult to understand than the words they define.
词语的定义不应比所解释的词语更难理解.
When boundaries between countries are not clearly defined, there is usually trouble.
国与国之间的边界未明确划定时，通常会发生纠纷。
The powers of a judge are defined by law.
法官的权限是由法律规定的。
