1. The nobles had oppressed and exploited their serfs.
    贵族压迫剥削农奴。

1. 奴隶：5.资源共分:粘土(cley),木头(wood)石头(stone)铁(iron)硫磺(suflur)税金(tuelur) 木头从树采集,只能用奴隶(serf)所以伐木场一定要盖,造很多动西都要木头,建设研究要木头和粘土,商业要钱,化学要硫黄和铁,军事要铁和石头,

2. 农奴/奴隶/服苦役的人：serenity /宁静/沉着/晴朗/ | serf /农奴/奴隶/服苦役的人/ | serfage /农奴的身份/农奴制度/

3. serf什么意思

3. 服苦役的人：serf 服苦役的人 | serfHelotvillein 农奴 | serfageserfdomserfhood 农奴的身份

1. (旧时的)农奴
    In former times, serfs were a class of people who had to work on a particular person''s land and could not leave without that person''s permission.

1. (Middle Ages) a person who is bound to the land and owned by the feudal lord

    Synonym: helotvillein