Taxation is not popular in principle, merely acceptable in context.

征税原则上不受大众欢迎，只是联系背景看是可接受的。

I agree with it in principle but I doubt if it will happen in practice.

我原则上是同意它的，但我怀疑在实践中它是否会发生。

In principle there is nothing that a human can do that a machine might not be able to do one day.

原则上，总会有一天，凡是人能做的事，机器就能做。

The decision had been agreed in principle before today's meeting, but some controversy surrounded it.

在今天的会议之前该决定原则上已获同意，但围绕这项决定还存在一些争议。

I'm not opposed to a core curriculum in principle, but I think requiring a foreign language is unrealistic.

原则上我不反对必修课程，但是我认为把外语列为必修课是不现实的。