understanding: ；n. 谅解，理解；理解力；协议
adj. 了解的；聪明的；有理解力的
v. 理解；明白（understand的ing形式）
I understand your reluctance to leave .我理解你为什么不愿离开此地。
In the end she will understand his feelings .她终究会了解他的感情。
They understood what we were doing。他们理解我们当时正在做的事情。
Bevy and i understand each other perfectly .白妃和我彼此非常了解。
He reads so fast and understands so well .他看书看得太快，悟性也高。
understand: ；
vt. 理解；懂；获悉；推断；省略；明白
vi. 理解；懂得；熟悉
I understand how she feels .我理解她是什么感觉。
Mr obama appears to understand .奥巴马似乎理解这一点。
So I understand your irritation .所以我理解你的心情。
Showering is easy to understand .洗澡就容易让人理解。
But I can '；t understand this problem .可是我不懂这道题。
understanding和understand区别
前者是名词，或形容词，理解或善解人意的；后者是动词。理解
