Many explanations focus on water content and oxidation states of the magmas.

Most current explanations focus on the concept of a misconnection between the mind and the body.

So any explanation of why it started must focus on the collapse in investment.

Scientists are still debating the cause; most explanations focus on the chemicals we pump into the air.

Also, this explanation focuses solely on the "3D" part of today's announcements.

The second explanation of the shift to rural areas focuses on the changes that have occurred in the production process.

Psychological explanations focus on the mental processes involved in childhood language learning.

Increasingly, the explanations for gender distinctions focus on one phenomenon.

More complicated explanations focus on the air pressure around the wing, but these approaches are merely different expressions of the same underlying physical principles.

More plausible explanations focus on investment - or, rather, the lack thereof.