update text in readme

README.md

@@ -31,10 +31,10 @@ camera has a good internal clock (e.g. because it is using a well behaved NTP
 client), the timestamps from the camera alone should be sufficient to
 reconstruct quite precisely (see below for details about "quite precisely") when
 images were acquired. Alternatively, if the camera's internal clock is not as
-ideal, the timestamps saved by `retina-record` can be used to roughly align the
-data under the assumptions that network delays are insignificant and that the
-clock of the PC on which `retina-record` runs is reliable. Furthermore,
-supported by the partial redundancy of these data types, more sophisticated time
+ideal, the timestamps saved by `retina-record` can be used to align the data
+under the assumptions that network delays are insignificant and that the clock
+of the PC on which `retina-record` runs is reliable. Furthermore, supported by
+the partial redundancy of these data types, more sophisticated time
 reconstruction approaches can be implemented on videos recorded with
 `retina-record`. These data are saved in the H264 video track in the MP4 file
 using Supplemental Enhancement Information (SEI).