"Lots and lots of companies from overseas, especially from China, selling very cheap products, that users can have in order to recharge their cell phones or small devices, that run on solar energy or wind energy."

VOA: special.2011.01.10

It has to be small, and it has to be lipid soluble in order for it to pass through a cell membrane.

这些分子必须非常小,而且必须是脂溶性的,才能穿过细胞膜

耶鲁公开课 - 生物医学工程探索课程节选

They're small molecules that - whose principal function in the body is to carry signals from one cell in the nervous system to another.

它们都是小分子,在体内主要功能是在,神经系统内将信号,从一个细胞传导到另一个细胞

耶鲁公开课 - 生物医学工程探索课程节选