不是抽象名词，它是动词。
vt. 理解；懂；获悉；推断；省略；明白
vi. 理解；懂得；熟悉
I fully understand your motives.
我完全理解你的动机。
"I quite understand," he replied.
“我很理解”，他回答道。
Can you understand French?
你懂法语吗？
Do you understand the instructions?
你懂得这些指令的意思吗？
You'll never get him to understand.
你永远不会使他明白的。
