understanding可數嗎

　　There was complete understanding between Wilson and myself.

　　威爾遜和我彼此完全理解與信任。

　　We must tackle the problem with sympathy and understanding.

　　我們必須帶著同情和諒解來處理這個問題。

　　The committee has little or no understanding of the problem.

　　委員會對這個問題了解不多或根本不了解。