It can be controlled in a variety of ways.

可以通过多种不同途径

耶鲁公开课 - 生物医学工程探索课程节选

what's the best way to study. I've got a lot of help that way.

学习的最佳途径是什么。我得到了很多帮助。

与护理专业的学生 - SpeakingMax英语口语达人

There is no way that you could irradiate a crystal of nickel with a single beam of x-rays and get that circular ring pattern if the electron beam were behaving as a particle beam only.

没有什么其他的途径,可以让镍晶体发射,单束X光来,继而得到环状图案,如果电子束,是以粒子束形式出现的。

麻省理工公开课 - 固态化学导论课程节选

So the access that a cell has to certain kinds of genes, or chemical modifications of DNA, not chemical modifications that change the base pairs, that would be a mutation.

因此细胞变化的途径应该是对某些基因,或者DNA进行化学修饰,不是更改碱基对,更改碱基对就是突变了

耶鲁公开课 - 生物医学工程探索课程节选