I take the painting brush as a tool for self-expression, to convey people's inner complex awareness and the lonely relations between people.

我以画笔作自我表述的工具，表达出人们内心的复杂意识及孤独的人我关系。

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But the formation of the beautiful, more complex inner structures is not well understood.

但是这种美丽且更为复杂的内部结构的形成还不为人知。

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Building on decades of research and mountains of data, scientists and animators are now recreating in vivid detail the complex inner machinery of living cells.

在数十年研究和数据积累的基础上，科学家和动画师们正在再造活细胞复杂内部机构的生动细节。

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Humans, however, are subject to complex inner pain that includes fear, guilt, shame, grief, rage and hopelessness.

CNN: After tragedy, brain needs to heal

The FTC's probe is still at an early stage, with investigators seeking to learn the inner workings of a complex business.

WSJ: FTC Focuses Google Probe on Android, Web Search

Or narrate the inner workings of a complex machine?

FORBES: How to make shopping more fun