basis
/ˈbeɪsɪs; `besɪs/ n
(pl bases/ ˈbeɪsi:z; `besiz/)
1 main principle that underlies sth; foundation 构成某事物的主要原则; 基础
the basis of morality, friendship, etc 道德、友谊等的基础
arguments that have a firm basis, ie that are founded on facts 有坚实基础（有事实根据）的论据
Rates of work are calculated on a weekly basis. 工资是以周为计算基准的.
2 starting-point for a discussion 讨论的出发点
No basis for negotiations has been agreed upon. 谈判以什麽为中心议题尚未取得一致意见.
This agenda will form the basis of our next meeting. 本议程将成为下次会议的中心议题.