swap

• 名词，指用一物换取另一物，通常价值相当；也可指交换、替换或互换的行为。

A noun referring to an act of exchanging one thing for another, typically of equal value.

1. An equal exchangeA2informal

   An act of giving one thing and receiving another of similar value in return.

   交换

   • We made a fair swap of our comic books.
   • The children arranged a swap of their toys.
   • They agreed to a swap of their shifts at work.

   同义词barterexchangeinterchangeswoptrade

• 动词，表示用一样东西交换另一样东西，也指把两个事物互换位置或角色。

A verb used to indicate the act of exchanging one thing for another.

1. Exchange or tradeA2informal

   To give something in exchange for something else.

   交换

   • They swapped phone numbers after the meeting.
   • I swapped my sandwich for her salad.
   • The children swapped toys during playtime.

   同义词barterexchangeinterchangesubstituteswitchtrade

   反义词keepretain

2. Move data in memoryC1formalIT

   To move a piece of a program or data into or out of the main memory, typically to free up space.

   内存交换

   • The operating system swaps inactive processes to the hard drive.
   • Memory swapping can slow down the computer if it happens too often.
   • The programmer optimized the code to reduce swapping.

   同义词exchangepage