It's just very time consuming to get such a large quantity of data.

要收集这么多的数据就是非常耗时。

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This kind of migration is tedious and has a high cost in terms of money and time when there is a quantity of data involved.

当涉及到大量数据的时候，这种类型的移植操作单调冗长而且会花费大量的资金和时间。

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Users are both the information demander and information provider, information quantity of the website can reach a certain level within a short time in this mode.

用户既是资源的需求者，同时也是提供者，以这种模式在短时间内就可以使网站的资源存储量达到一定的水平。

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At that time, a small quantity of US shale oil was being unlocked by mining the rock out of the ground, trucking it to centralized plants, and heating the rock to release the hydrocarbons.

FORBES: If America is the New Saudi Arabia, What Does That Mean for Our Energy Future?

The algorithm could be of great interest to Twitter, which could charge a premium for ads linked to popular topics, but it also represents a new approach to statistical analysis that could, in theory, apply to any quantity that varies over time: the duration of a bus ride, ticket sales for films, maybe even stock prices.

FORBES: Twitter Trending Prediction Algorithm: Possibly Of Most Use To Journalists

By contrast, the PPI payments were, by the time of the Budget, very much a known quantity.

BBC: A welcome boost - unless you're a bank