What's a physical mechanism that could lead to differences between these two cells at this very early stage of development?

什么样的生理机制导致细胞,在发育伊始就产生这些差异

耶鲁公开课 - 生物医学工程探索课程节选

Let me begin by introducing the teaching fellows for this course; and so I have them up here.

课程伊始,先介绍下课程助教,我把他们的简历展示在这里

耶鲁公开课 - 金融市场课程节选

The objection is similar to the kind of dismissive attitude that we saw at the beginning of the course about the question, "Could I survive my death?"

这个反驳和这门课伊始我们讨论的,某个问题一样都带着某种轻蔑的态度,我们能幸免于死吗

耶鲁公开课 - 死亡课程节选

Well, it really happens throughout development and it happens from the first stages.

这一过程不仅贯穿整个发育阶段,并且于胚胎发育伊始就存在

耶鲁公开课 - 生物医学工程探索课程节选

He spent most of his life in Vienna, Austria, but he died in London and he escaped to London soon after retreating there at the beginning of World War II as the Nazis began to occupy where he lived.

他的大半生都是居住在奥地利的维也纳，却在伦敦去世,二战伊始，随着纳粹侵占其家乡,他被迫背井离乡,后来逃到伦敦，在那里终其余生。

耶鲁公开课 - 心理学导论课程节选

Some of you-- This incidentally will be a more technical of my lectures and it's a little bit unfortunate that it comes early in the semester.

对于部分人来说,这堂课相对于我其他的课程较为专业,而且不巧的是,这门课在学期伊始就开始了

耶鲁公开课 - 金融市场课程节选