Complex sentence: In the twenties he published some short stories but his main focus was on translations of Western writers into Russian-he translated over thirty books while working for a publishing house (until 1937) as a specialist in Western literature.
Split into simpler sentences: In the twenties he published some short stories but his main focus was on translations of Western writers into Russian. He translated over thirty books while working for a publishing house (until 1937) as a specialist in Western literature.