Today's battery breakthroughs come as the world looks to expand modern energy access to the billion or so people without it, while also cutting back on fuels that warm the planet.
出自-2016年12月阅读原文
It is a breakthrough in the study of the nerve system.
出自-2012年12月听力原文
The breakthrough came when I was introduced to Fila Flex, which is a new kind of printing material.
2016年12月六级真题（第二套）听力 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
突破；重大进展
A breakthrough is an important development or achievement.