学习任务不变，但我可以在任何地方学习。

The workload is the same, but I can do it anywhere.

youdao

当你阅读本文时，这些数字肯定有所不同，但我预期比例保持不变。

By the time you read this article, the Numbers are sure to be different, but I expect the ratios to remain the same.

youdao

虽然教材还是原来的不变，但我自身却变了，更重要的是，我的学生变了。

When the material is the same, I change - and, more important, my students change.

youdao

And I know it is only the third quiz, but I like to keep the quiz number the same as the homework number.

我知道这只是第三次小测，但我喜欢将小测题数保持不变,就像家庭作业题一样。

麻省理工公开课 - 固态化学导论课程节选