1.obesity n.肥胖；肥大
Obesity is a problem for many people in western countries.
西方国家很多人都有过度肥胖的问题。
2.physiology n.生理学；生理机能
We had studied physiology in middle school.
我在中学就已经学过生理学。
3.optimum n.最适宜
The market offers optimum condition for sale.
市场为销售提供了最佳条件。
4.assumption n.假定；设想
The project was predicated on the assumption that the economy was expanding.
这一计划是以经济发展的设想为依据的。
5.speculate v.推测
He likes to speculate on the stock market.
他喜欢炒股。
