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1 files changed, 3 insertions, 3 deletions

diff --git a/content/know/concept/maxwell-bloch-equations/index.pdc b/content/know/concept/maxwell-bloch-equations/index.pdc
index 3a0df1b..ae7d119 100644
--- a/content/know/concept/maxwell-bloch-equations/index.pdc
+++ b/content/know/concept/maxwell-bloch-equations/index.pdc
@@ -14,7 +14,7 @@ markup: pandoc
 
 # Maxwell-Bloch equations
 
-For an electron in a two level system with time-independent states
+For an electron in a two-level system with time-independent states
 $\ket{g}$ (ground) and $\ket{e}$ (excited),
 consider the following general solution
 to the full Schrödinger equation:
@@ -391,10 +391,10 @@ $$\begin{aligned}
 
 It is trivial to show that $\vb{E}$ and $\vb{P}$
 can be replaced by $\vb{E}^{+}$ and $\vb{P}^{+}$.
-It is equally trivial to convert
+It is also simple to convert
 the dipole $\vb{p}^{+}$ and inversion $d$
 into their macroscopic versions $\vb{P}^{+}$ and $D$,
-simply by summing over all atoms in the medium.
+simply by averaging over the atoms per unit of volume.
 We thus arrive at the **Maxwell-Bloch equations**:
 
 $$\begin{aligned}