标题：Tsung-Dao Lee, 97, Physicist Who Challenged a Law of Nature, Dies

正文：Tsung-Dao Lee, a Chinese American physicist who shared the Nobel Prize in Physics in 1957 for overturning what had been considered a fundamental law of nature — that particles are always symmetrical — died on Sunday at his home in San Francisco. He was 97.

知识点：overturn v.

1. if sth overturns , or if sb overturns it, it turns upside down or on its side倾倒；倾覆；翻掉

The car skidded and overturned.汽车打滑翻倒了。

He stood up quickly, overturning his chair.他猛然站起来，弄翻了椅子。

2. to officially decide that a legal decision etc. is not correct, and to make it no longer valid推翻，撤销（判决等）

to overturn a decision/conviction/verdict 撤销决定╱定罪╱裁决

His sentence was overturned by the appeal court.上诉法庭撤销了对他的判决。

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