translation: Update chapter_stack_and_queue/index.md (krahets#1035)

* Updata number_encoding.md

* Update number_encodimg.md

* update chapter_stack_and_queue/index.md

docs-en/chapter_stack_and_queue/index.md

@@ -8,6 +8,6 @@
 
 !!! abstract
 
-    Stacks are like stacking cats, while queues are like cats lining up.
+    A stack is like cats placed on top of each other, while a queue is like cats lined up one by one.
 
-    They respectively represent the logical relationships of Last-In-First-Out (LIFO) and First-In-First-Out (FIFO).
+    They represent the logical relationships of Last-In-First-Out (LIFO) and First-In-First-Out (FIFO), respectively.