Removing ambiguity in type-layout.md

Author: marcospb19

src/type-layout.md

@@ -23,8 +23,8 @@ array with that item type including alignment padding. The size of a value is
 always a multiple of its alignment. The size of a value can be checked with the
 [`size_of_val`] function.
 
-Types where all values have the same size and alignment known at compile time
-implement the [`Sized`] trait and can be checked with the [`size_of`] and
+Types where all values have the same size and alignment (both known at compile
+time) implement the [`Sized`] trait and can be checked with the [`size_of`] and
 [`align_of`] functions. Types that are not [`Sized`] are known as [dynamically
 sized types]. Since all values of a `Sized` type share the same size and
 alignment, we refer to those shared values as the size of the type and the