如何使用 "understand" 造句

1. I understand how she feels .
我理解她是什么感觉。
2. Mr obama appears to understand .
奥巴马似乎理解这一点。
3. So I understand your irritation .
所以我理解你的心情。
4. Showering is easy to understand .
洗澡就容易让人理解。
5. But I can 't understand this problem .
可是我不懂这道题。