basis
/ˈbeɪsɪs/noun
(pl. bases /-sɪz/)
1- the underlying support or foundation for an idea, argument, or process基础：
trust is the only basis for a good working relationship.
信任是建立良好工作关系的惟一基础。
1.1
- with adj. the system or principles according to which an activity or process is carried on（活动或过程进行的）方式, 原则：
she needed coaching on a regular basis.
她需要定期辅导。
1.2
- the justification for or reasoning behind something根据：
on the basis of these statistics important decisions are made.
根据这些数据作出重大决定。
词源
late 16th cent. (denoting a base or pedestal)： via Latin from Greek， 'stepping'. Compare with BASE1.