Add comments on "borrowing" in Rust

Author: kPatch

RUST.md

@@ -31,5 +31,17 @@ so &mut isn't needed that often.
 Passing by reference is important when we have a large object and don't wish to copy it.
 ```
 
+```
+A C programmer pronounces & as 'address of'; a Rust programmer pronounces it 'borrow'. 
+This is going to be the key word when learning Rust. 
+```
+
+```
+Borrowing is the name given to a common pattern in programming
+; whenever you pass something by reference (as nearly always happens in dynamic languages) or pass a pointer in C. 
+
+Anything borrowed remains owned by the original owner.
+```
+
 ## References
 - [Rust: Gentle Intro](https://stevedonovan.github.io/rust-gentle-intro/)