substitute
单词辨析：
普通用词，可以指取代、替换某人的工作，也可指用新的物品替代旧的、坏的物品。
Who will replace Sam on the team?
谁将接替队里的萨姆？
Three of the bulbs have to be replaced.
其中3个灯泡必须得换下来。
They replaced the wooden chairs with plastic ones.
他们用塑料椅子来代替木头椅子。
指取代、替换某人或某物的位置。
He is ready to displace Gerrard in England's starting line-up.
他已经准备好接替杰拉德在英格兰队的首发位置。
Gradually, natural gas has displaced coal as a major source of energy.
天然气逐渐取代煤成为主要能源。
指用新的或不同的东西代替原来的，也指代理某人的职位或替代球员，常后接介词 for。
The chef said you could substitute ketchup for the vinegar.
主厨说过可以用番茄酱代替醋。
Who substituted for Susan when she was out sick?
苏珊生病没上班时，谁暂时接替了她的工作？
After 20 minutes on the field he had to be substituted.
上场20分钟后他不得不被替换下来。
相关例句：
There is no substitute for good food and exercise.
没有什么能够代替营养丰富的食物和运动。
The printed word is no substitute for personal discussion with a great thinker
阅读印在纸上的内容远不如与伟大的思想家面对面探讨那般受益。
Coming on as a substitute, he scored four crucial goals for Cameroon.
作为替补队员上场的他为喀麦隆队打入了四粒关键进球。
Can I substitute milk for cream?
我可以用牛奶代替奶油吗？
You can substitute water for milk in the recipe.
你可以在菜单中以水代替牛奶。
She is seeking a substitute for the very man whose departure made her cry.
那个男人的离去令她伤心痛哭，她正想找一个人填补内心的空缺。