6. To boil over – when someone cannot control their anger and start to argue or fight(当一些人不能控制他们的愤怒从而开始争吵或是打架)
例句：The situation was so tense in the boardroom that people’s tempers were boiling over by the end of the meeting.
7. To simmer down – to become calm(冷静下来)
例句：Hey, simmer down and relax. Getting angry won’t change things.
8. To Simmer with rage/anger – to be filled with negative emotions like rage and anger(充满愤怒和生气等负面情绪)
例句：Susan simmered with rage when she saw the mess her son made in the kitchen.