》》14.  人工左手材料 Metamaterials
他提出的基本概念是，一些所谓“超材料”(meta-material，有时称为左手材料)的性能并不是由他们的化学成分确定，而是由其最细微的结构确定的。
~~~~~~~~~~~~~~~~~~~~~~
Among them is Professor Sir John Pendry, who received the Isaac Newton Medal for his outstanding contribution to Physics. His work exploring metamaterials has led to the possible development of invisibility cloaks, which has captured imaginations around the world.
http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_1-7-2013-10-13-36

Meta-material for use in a base station of a wireless communication system
US 8013693 B2
http://www.google.com.hk/patents/US8013693?hl=zh-CN&dq=7,958,388

metamaterials 和meta-materials都对。
中间的“-”（hyphen）可用可不用。
这在英语中普遍吗？

英语是以发音为基准的，加上这个符号不影响发音，但是读者就更容易识别出本来意义，还有很多例子，比如superfluorescence太长，写成super-fluorescence就相对容易理解一些。