Many kinds of molecules make up your coffee There are the water molecules, the flavor molecules the milk proteins, etcetera.

许多不同种类的分子构成了你的咖啡,有水分子，气味分子，牛奶蛋白等等。

麻省理工公开课 - 热力学与动力学课程节选

You know probably that within your bone marrows there's populations of cells, there are different kinds of cells within the bone marrow.

你也许知道的,在你的骨髓里,有许多种细胞,骨髓中有不同种类的细胞

耶鲁公开课 - 生物医学工程探索课程节选

One could easily, for example, differentiate between a red cell and a neuron, but a skilled biologist who's looked at many, many different cells could differentiate between different types of neurons.

普通人可以很轻易的,分辨出神经元和红细胞,然而一个训练有素的生物学家,辨识过许多不同细胞之后,能够分辨出不同种类的神经元

耶鲁公开课 - 生物医学工程探索课程节选