笔记：cutting-edge adj. 先进的，前沿的
在表示新技术的时候，经常用到这个词，meaning the newest, most advanced stage in the development of sth.
In 2021, when Amazon launched its first “just walk out” grocery store in the UK, the newspaper reported it as cutting-edge technologies.
2021 年，当亚马逊在英国开设第一家“just walk out”超市时，该报将其报道为尖端技术。


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