n.转换开关，转换开关（装置）；工具变换装置，变换器；变流器

I need to change my password because of security concerns.
我需要更改密码，因为有安全方面的顾虑。
The weather changed suddenly, and it started raining heavily.
天气突然变了，开始下起了大雨。
Can you change the channel please? I'm not interested in this program.
你能换个频道吗？我对这个节目不感兴趣。
She changed her mind about going to the party after hearing there would be many people she didn't know.
听说聚会上会有很多她不认识的人后，她改变了参加派对的主意。
The leaves on the trees change color in autumn, creating a beautiful scenery.
树叶在秋天变色，形成了一道美丽的风景。
He decided to change his career path and pursue his passion for photography.
他决定改变职业道路，去追求他对摄影的热爱。
The baby needs a diaper change; she seems uncomfortable.
婴儿需要换尿布了，她看起来很不舒服。
The new manager implemented several changes to improve office productivity.
新经理实施了几项变革以提高办公室的工作效率。
It's time to change the oil in my car; it's been over 5,000 miles.
是时候给我的车换机油了，已经超过了5000英里。
After the accident, she had a change of heart and became more cautious while driving.
事故发生后，她有了转变，开车时变得更加谨慎。