But sadly, no central planner can know which people need to go where when and how much value should be attached to each trip. Only the individuals themselves know this.

但遗憾的是，没有哪个中央计划系统能知道人们什么时候需要去哪儿，以及他们的行程有多大价值，这只有当事人自己才知道。

youdao

Correlation predicates typically compare some key value in the event, such as a unique trip identifier, with a metric containing the same key.

关联谓词通常将事件中的某个键值(例如唯一旅行标识符)与包含相同键的度量作比较。

youdao

According to a popular saying the value of life is not measured in the number of years, the same way the value of a trip is not calculated by the number of destinations!

有一句广为流传的名言是这样说的，生命的价值并不是以年龄的大小来衡量的。同样，一场旅行的价值也不是以目的地的数量来计算的！

youdao

The Greenwood Dale Foundation Trust, which is funded by the government and runs the academy, said the trip was "value for money".

BBC: Skegness Academy

The higher the score, the better the overall value of the trip.

FORBES: Magazine Article

But just as important is getting the best value out of a trip.

FORBES: Travel Web Sites Get Personal