Acne vulgaris is a complex condition involving many factors. The changes that occur in the body around the time of puberty are part of the story.

寻常痤疮是牵涉到多种影响因子的一种复杂状况，在青春期身体情况发生的变化是起因之一。

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The human brain is the most complex part of the human body.

人脑是人体中最复杂的部位。

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As the body part of the structure is more complex than the frame, so the electrophoresis process requirements higher than the frame.

由于车身部分结构比车架更为复杂，所以对电泳工艺的要求比车架更高。

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The most complex part of the build was etching the printed circuit boards that spotted when a body part or the tongs touched the live edges of the hole it was in, said Mr Lang.

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Once at Selly Oak, many patients will have numerous trips to the operating theatre, sometimes between 10 to 15, often for complex reconstruction work and skin or tissue grafts from one part of the body to another.

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