Coco de Mer tree是棕榈科复椰子属的植物，这个植物群在马达加斯加岛(非洲岛国)有四个种属 塞舌尔的种类约占世界上七分之一，分布于印度洋的沿海地区及其岛屿上。

The Coco de Mer belongs to the Coryphoidae subfamily and tribe Borasseae. Borasseae is represented by four genera in Madagascar and one in Seychelles out of the seven worldwide.

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复反射群作为与实反射群不同的一类反射群，近年来得到了人们越来越多的研究。

As a class of finite reflection groups and different from finite real reflection groups, finite complex reflection groups are studied by more and more people in recent years.

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本文提出了基于FPGA技术实现数字复接系统的设计方案，并介绍了基群与二次群之间的复接与分接的系统总体设计。

This paper puts forward a design method of digital multiplex system with FPGA, and introduces the whole system of multiplexing and demultiplexing between primary group and secondary group.

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