Why has it been so hard and why does it continue to be difficult to identify these pluripotent cells within tissues?

为什么会那么难呢,为什么在组织中识别多能干细胞,始终困难重重呢

耶鲁公开课 - 生物医学工程探索课程节选

I can't help but continue to encourage you to study hard.

我可忍不住继续鼓励你好好学习哦！

I can't help but 课堂 - SpeakingMax英语口语达人

And I want to ask you to please continue working hard.

我想请你继续努力工作。

I'm afraid of 实战 - SpeakingMax英语口语达人

I'm afraid that you are sleeping, continue working hard.

我担心你睡着了，要继续努力学习哦！

I'm afraid of 课堂 - SpeakingMax英语口语达人