2. an important point in time = a decisive moment
3. the first/last stage in a process = the first/last phase
4. the first/last action in a series of actions = the first/last step
5. make sb feel calm = give sb peace of mind
6. the moment when you can no longer change anything = the point of no return
7. repeat one action = do the same thing over
8. do a series of actions again = repeat a sequence
