It requires two people, which works out more expensive.
这需要两个人，这样算起来就更贵了。
A joint action is any action that requires two or more participants.
联合动作是任何需要两个或多个参与者参与的动作。
A typical application requires two trips across the network for each SQL statement.
典型的应用程序对每条sql语句都需要在网络上进行两次通信。
Game requires two players to play the game.
游戏需要2名玩家同时游戏。
Game requires two players to play the game.
游戏需要2名玩家同时游戏。
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