The basic purpose of the promotion of at least become a factor in the purchase of incentive, can take a single is a single thing.
促销的基本目的至少也是成为激励购买的一个因素，能够多带一单是一单嘛。
2
We also need to reconsider our promotion policy and make it an incentive for our staff.
我们也需要重新考虑提升的政策而且使其激励我们的员工。
3
Based on a basic principal-agency model, the article Analyses the trade-off between pay for performance and promotion based incentive contract, and also points out the topics for future research.