但常常需要等到旷日持久的政治和政策僵局已经到了不得不打破的程度 — — 并且常常造成高昂的代价，如群众暴力和生命损失。
But this typically happens only when an extended political and policy stalemate must be broken – and it often comes at a high cost in terms of public violence and loss of life.