/ˈsʌb.stə.tuːt/
a person or thing that you use or have instead of the one you normally use or have; a person or thing that takes the place or function of another
a meat substitute
肉食替代品
a substitute family
收养家庭
~ for sb/sth
Paul’s father only saw him as a substitute for his dead brother.
保罗的父亲只是把保罗当作他死去的哥哥来看待。
The course teaches you the theory but there’s no substitute for practical experience.
这门课教的是理论，但没有任何东西能代替实践经验。
The local bus service was a poor substitute for their car.
他们坐当地的公交车，这比坐自己的汽车可差远了。
verb
[I, T] to take the place of sb/sth else; to use sb/sth instead of sb/sth else （以…）代替；取代
~ for sb/sth
Nothing can substitute for the advice your doctor is able to give you.
大夫所能给你的忠告是无可替代的。
~ A for B
Margarine can be substituted for butter in this recipe.
做这道菜可以用人造黄油代替黄油。
~ B with/by A
Butter can be substituted with margarine in this recipe.
做这道菜可以用人造黄油代替黄油。
~ sb/sth
Ronaldo was substituted in the second half after a knee injury (= somebody else played instead of Ronaldo in the second half).
下半场罗纳尔多膝盖受伤被换下。