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。

《柯林斯英汉双解大词典》

If your building blueprint graphic is very large or you intend to map an enormous quantity of data points, you may require the latest multicore processor and several gigabytes of RAM.

如果建筑物设计图非常大或者需要映射非常大量的数据点，则有可能需要使用最新的多核处理器和几个GB的内存。

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