I got the idea from a story named “Soft Time” – about young people spending time in Lijiang.

我读过一篇名为《温柔时光》的文章，讲述了一群年轻人在丽江的生活，正是这个故事启发了我。

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Vehicle routing problem with soft time Windows (VRPSTW) is a variation of vehicle routing problem (VRP), which is a typical NP-hard problem.

带软时间窗的车辆路径问题(VRPSTW)是在基本的车辆路径问题(VRP)上增加了时间窗约束条件的一种变化形式，是一个典型的NP -难问题。

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The results demonstrate that the feasible solutions to the not-fully-loaded vehicle scheduling problem with soft time windows can easily be obtained using the algorithm.

结果表明，用该算法进行带软时间窗的非满载车辆调度优化问题，可以方便有效地求得满意解。

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At the same time he heard, or imagined he heard,a light, soft step and then another.

VOA: special.2009.10.31

PepsiCo will not be advertising its flagship soft drink in the game for the first time in 23 years.

VOA: standard.2010.01.27

Version software download, in order to be able to save to SD memory card is inserted into the Nintendo 3DS, do not have time or want to play more than one soft carrying at the same time, replace.

ENGADGET: Nintendo 3DS gets first downloadable titles next week: Super Mario and Brain Training sequels

The cuts are the latest attempt by the New York company to boost returns and curb expenses at a time of soft economic growth and tougher regulations.

WSJ: J.P. Morgan to Cut $1 Billion in Costs, 4,000 Jobs

By the time the soft spoken Dodgers manager sat behind the designated table for a 30 minute session with the baseball writers, a phalanx of microphones and television cameras were ready to capture every syllable and word that Mattingly uttered regarding the 2011 season and the future of his ball club.

FORBES: Can The Dodgers Find A Driving Force In Post-McCourt Era?