to cause problems or upset a stable situation
вызывать проблемы или нарушать стабильную ситуацию (vyzyvat' problemy ili narushat' stabil'nuyu situatsiyu)
"Everything is going well, so let's not rock the boat with unnecessary changes."
"Все идет хорошо, так что давайте не будем рокать лодку ненужными изменениями." (Vse idet khorosho, tak chto davayte ne budem rockat' lodku nenuzhnymi izmeneniyami.)
to start doing new and independent things
to give someone or something a fresh start or new energy
to adjust to new conditions or circumstances
to combine different things into one
to reconsider something carefully before acting
to assert your authority or make a firm decision