On the photo of MRI, most of T1 and T2 photos had a lower or black signal area (flow-empty actions).

畸形血管团MRI表现：多数T1、T2加权像为纡曲成团的低或黑信号区（流空效应）。

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Objective: To explore the relationship between lumbar disc high signal area in MRI and lumbar intervertebral low back pain.

目的：探讨腰椎间盘MRI高信号区与椎间盘源性下背痛的相关性。

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The basic idea deals with our country nowadays city traffic network structure and traffic flow based on traffic signal area control theory.

本系统的基本思想是针对我国现行城市路网结构及交通流的具体特点，基于交通信号区域控制理论展开的。

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That was some, not too complicated, but hopefully understandable description of a whole area of biology called signal transduction.

这些并不复杂,却有希望描述清楚,生物学领域一大类现象,称为信号转导

耶鲁公开课 - 生物医学工程探索课程节选

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