The traffic signals along Factoria Boulevard in Bellevue, Washington,
_________ (not generally) flash the same length of green twice in a row,
especially at rush hour. At 9:30 am, the full red/yellow/green signal cycle
might be 140 seconds. By 9:33 am, a burst of additional traffic might push it
to 145 seconds. Less traffic at 9:37 am could push it down to 135. Just like
the traffic itself, the timing of the signals changes.
请问这里是填don't generally还是generally don't?