转变：从使用或做一件事情转变为另一件事情的变化。
switchover /ˈswɪtʃˌəʊvə/
名词 the act or an instance of changing from one method, policy, or technology to another 替换
the switchover to digital television
切换
切换
... switch off （用开关）关掉；切断（电源） switch in 接通；合闸 switch over 转接；转做另一工作 ...
... 转换;变换：transition 转换，转接，换向，换速：throw-over 转换，切换，转接：switch over ...
... switch yard 升压站 switch over 切换;转换 skin stress 表皮应力 ...
... switch off （用开关）关掉；切断（电源） switch in 接通；合闸 switch over 转接；转做另一工作 ...
Within a few years the whole country will switch over to digital television.
几年内全国将会换上数字电视。
Considered to be a less dangerous alternative to tobacco, "e-cigarettes" are taking over the West as more and more people switch over when trying to kick the habit.
随着越来越多的人开始戒烟，被认为危险程度更小的替代物——电子烟在西方国家流行起来了。
Switch over to MBX.
切换到MBX。
So,even more people switch over to public transportation.
VOA : standard.2010.07.26
So we're going to finish talking about molecular orbital theory, we'll switch over to discussing bonding in larger molecules, even larger than diatomic, so we'll move on to talking about valence bond theory and hybridization.
我们要结束关于分子轨道理论的讨论，转向讨论大分子的成键，比二原子分子更大的分子，我们会继续讨论价电子成键理论,和杂化。
化学原理课程节选 : 麻省理工公开课
and then decided to switch over into a little bit more of the brand management side of the business,
然后我决定做一些调整，向品牌管理方面发展，
SpeakingMax英语口语达人 : 我的职业是
The answer is for unionized workers to switch over to Health Savings Accounts (HSAs).
He said the advert was used before switch over and was not used again following complaints.
If he changes his mind, he can switch over to his own benefits at any time.