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。

The process is very time consuming.

但整个过程相当耗时。

This is time consuming and error prone.

这样做会消耗大量时间，并且容易导致错误。

Creation of unit tests is a time consuming process.

创建单元测试是一个耗费时间的过程。

Again, very time consuming and not my cup of tea.

再次，这相当耗费时间，非我所爱。