经理在比赛末段的换人改变了比赛的走向。

The manager's late ___substitution changed the course of the game.

纸质记录已逐渐被数字文件所取代。

There has been a gradual ___substitution of paper records with digital files.

在这个食谱中，你可以用酸奶代替奶油，做出更健康的选择。

You can make a healthy ___substitution by using yoghurt instead of cream in this recipe.