中文摘要：

脑机接口技术（BCI）是指基于在线脑信号的脑与外环境之间的交互技术.本文介绍了BCI涉及的几个主要方面,并展望了BCI技术的未来发展.

英文摘要：

Brain-computer interface （BCI） is the technique which uses online brain-signal processing to enhance the interactions between human and environments. This article summarizes the main aspects of BCI, and the challenges for BCI from miracle to reality.