хотя

см. тж. несмотря на то, что; хотя и

Although this series is endless, the total can only be half as great as ...

Useful though the two minerals are, there is evidence that they may cause cancer.

As numerous as are the inorganic bromides that have found industrial use, the organic bromides have even wider application.

Источник: Русско-английский научно-технический словарь на Gufo.me