1. The duke´s son demeaned himself by doing manual labor with his servants .
    公爵的儿子降低自己的身份和佣人一起做工。

2. The duke summoned his feudatories to aid him in war.
    那个公国的君主召令他的藩臣出兵助战。

3. This hotel was originally the house of a duke.
    这家旅馆当初是一位公爵的房子。

4. She was betrothed (to the duke).
    她已许配（给公爵）了.