source的range问题

一个range translation table for numbers to activities (activityRange.dat ) 的例子：
# set the number of subdivisions
6
# define the intervals ex. [200,210] and attach
# a correlated activity: 1. Bq in this example
200 210 1.
211 220 3.
221 230 5.
231 240 10.
241 250 20.
251 255 40.

问题： [200,210]对应的1. Bq是指每个voxel的activity么？还是整个volume的？