different @code{Voice}, they may not be printed properly or at all.
If the @code{\partcombine} function cannot combine both music
-expressions (i.e. when both voices have different durations), it will
+expressions (i.e., when both voices have different durations), it will
give the voices, internally, its own custom names: @code{one} and
@code{two} respectively. This means if there is any @qq{switch} to a
differently named @code{Voice} context, the events in that differently