diff --git a/solutions/compound-types/slice.md b/solutions/compound-types/slice.md
index 6825779..32e84cb 100644
--- a/solutions/compound-types/slice.md
+++ b/solutions/compound-types/slice.md
@@ -17,7 +17,7 @@ fn main() {
 
     let slice = &arr[..2];
 
-    // TIPS: slice( reference ) IS NOT an array, if it is an array, then `assert!` will passed: each of the two UTF-8 chars '中' and '国'  occupies 4 bytes, 2 * 4 = 8
+    // TIPS: slice( reference ) IS NOT an array, because if it is, then `assert!` will passed: each of the two UTF-8 chars '中' and '国'  occupies 4 bytes, 2 * 4 = 8
     assert!(std::mem::size_of_val(&slice) == 16);
 }
 ```