These firms are a critical link between the pharmaceutical firms and governments.

这些物流公司是制药公司和政府之间的关键纽带。

Today his pioneering work is seen as a critical link between traditional and contemporary art.

今天，他的开创性作品被视为传统艺术和当代艺术之间的重要纽带。

The idea is that each step is a critical link as the links in a chain.

这个想法是，每一步都是链中的关键环节。