Finally, he had a speech that was interesting and perfectly understandable to his audience.
出自-2010年6月听力原文
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
（行为、情绪等）可以理解的，正常的，合情理的
If you describe someone's behaviour or feelings as understandable, you think that they have reacted to a situation in a natural way or in the way you would expect.
例句
His unhappiness was understandable.他不高兴是可以理解的。
ADJ-GRADED
（论述、理论等）容易理解的
If you say that something such as a statement or theory is understandable, you mean that people can easily understand it.
例句
Roger Neuberg writes in a simple and understandable way.罗杰·纽伯格的文章简明易懂。
英汉词典释义
adj.
能懂的;可理解的;可同情的
It’s quite understandable that she was annoyed.她被惹恼了, 这很能理解。