A:I cannot understand why she always helps and supports her brother.

A:我真不明白为什么她总是帮助、供养她的弟弟。

B:Why do you say so?

B:为什么这么说?

A:Because he is often in trouble.

A:因为他总是麻烦不断。

B:She had promised her mother that she would be with him through thick and thin.

B：她答应过自己的母亲，她将和弟弟同甘共苦。

A:Oh, I see.

A：我明白了。