B1 a food that is used with other foods in the preparation of a particular dish(食品的)成分,原料
B2 one of the parts of something successful(成功的)要素,因素
More examples
When cooking the sauce, don't forget that all-important ingredient, fresh basil.
You mix all the dry ingredients together before you add the milk.
He created a wonderful meal from very few ingredients.
This tiny capsule contains two types of effective painkilling ingredients.
The exact ingredients of Coca Cola are a trade secret.
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