口号‘追求卓越’用英语怎么说？

我认为应该这样翻译 :keep striving for excellence (强调坚持不懈)
我更推荐的译法是:Commitment to excellence(把追求卓越作为使命)
对于此类翻译我们不要拘泥于固有表达
下面给出一些相关表达的翻译
1.Brave in innovation, aspiring after excellence
勇于创新,追求卓越
2.keep an open mind, strive for excellence
海纳百川，追求卓越

Pursue being outstanding/woo eminence/pursuit the top
对优异质量的不懈追求；
unflagging pursuit of excellence

do one's best

简单点，就to be the best!

pursue excellence / superexcellence
go in for excellence