1 . convenience
...4C,组合,顾客,customer,成本,cost,便利,convenience,沟通,communication, 4R组合21世纪初,美国学者唐·舒尔茨,Don Shul.
2 . Facilitate
Facilitate 易化Facilitate 加速,便利Fainting 晕厥
3 . facility
facilitate v 使容易facility n 便利fact n 事实
4 . expedience
expected vlaue 期望值expedience n. 便利expediency =expedience