In 1921, while working for the General Motors Research Corporation in Dayton, Ohio, he investigated a compound called tetraethyl lead (also known, confusingly, as lead tetraethyl), and discovered that it significantly reduced the juddering condition known as engine knock.

1921年，他在位于俄亥俄州代顿的通用汽车研究公司工作期间，对一种名叫四乙铅的化合物作了研究，发现它能大大减少震动现象，即所谓的发动机爆震。

Back in 2015 a group of Toronto-based researchers discovered that planting just eleven more trees per city block would reduce heart-related conditions by the same amount as if everybody living on that block became a year and a half younger.

早在 2015 年，多伦多的一组研究人员就发现，只要在每个街区多种植 11 棵树，心脏相关疾病的减少量就相当于居住在该街区的每个人都年轻一岁半。