Complex sentence: A smaller pressure gradient reduces the rate of radial drift, limiting the turbulence generated by streaming instabilities, allowing solids to settle into a thinner mid-plane layer, and lowers impact velocities enabling the growth of larger solids.
Split into simpler sentences: A smaller pressure gradient reduces the rate of radial drift, limiting the turbulence generated by streaming instabilities. This allowing solids to settle into a thinner mid-plane layer and lowers impact velocities enabling the growth of larger solids.