Rephrase nonequilibrium part

Author: davidlmobley

paper/basic_training.tex

@@ -314,7 +314,7 @@ \subsubsection{Key concepts}
 Notably, many experiments are conducted at non-equilibrium conditions; for example, membrane diffusion coefficients are commonly measured by setting up a concentration gradient across the membrane and measuring the flux.
 It can be tempting to the beginner to setup an MD simulation in the same manner as such an experiment.
 However, maintaining non-equilibrium conditions is typically more complicated in an MD simulation than in an experiment as large reservoirs are commonly required.
-Frequently there exist equilibrium methods that can be used to obtain the same or similar information as a non-equilibrium experiment; users should seek to obtain familiarity with such methods before choosing to conduct a non-equilibrium MD simulation.
+Frequently, equilibrium methods can provide the same or similar information as a non-equilibrium experiment; users should seek to obtain familiarity with such methods before choosing to conduct a non-equilibrium MD simulation.
 
 
 \subsubsection{Books}