These problems are closely related.

这些问题都是密切相关的。

《牛津词典》

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Two closely-related strains of Clostridium difficile became antibiotic resistant and were able to rapidly spread to hospitals around the world, a study says.

BBC: C. diff spread 'fast and easy'

In part, the idea is to refine the approach first recognised in the 1930s, which exploits the chemical affinity between carbon dioxide and nitrogen-based molecules such as ammonia or the closely-related amines.

BBC: Whatever happened to carbon capture?

With the cultural perception that the people's health is linked to that of the environment, medicinal plant conservation and health care are closely inter-related in the Dolpo region.

UNESCO: Communication and Information