They become sticky and harden into the shape of the letter C, like a sickle, a hand tool with a curved blade.

VOA: special.2009.12.16

Well, it would be useful because if I could take cells from the skin, find stem cells in the skin and then de-differentiate them so that they were now capable of becoming liver, or brain, or things that they're not going to become in their normal site, then that could be a very powerful tool for medicine.

这是因为,如果我能取一些皮肤细胞,找一些皮肤干细胞,并将它们去分化,那它们就能分化成肝脏,大脑或其他一些,它们原本分化不出来的细胞,这可以成为一个医学利器

耶鲁公开课 - 生物医学工程探索课程节选

This was done by Shimomura that was kind of the first step in this process of having it become such a useful tool.

这个工作是由Shimomura完成的,这是它成为一个有用的,工具的过程中的第一步。

麻省理工公开课 - 化学原理课程节选

"Make no mistake," "We will close Guantanamo prison which has damaged our national security interests and become a tremendous recruiting tool for al-Qaida."

VOA: standard.2010.01.05

"It has become a diagnostic tool that informs and guides our efforts as we seek to build a global partnership to combat modern slavery,"

VOA: standard.2009.06.16