a mixing bowl的用法和样例：
- In a mixing bowl, cream egg yolks and 250g sugar.
- Combine together flour, dry yeast, and sugar in a mixing bowl.
- Sift flour in a mixing bowl, rub in butter to breadcrumb state.
- Sieve the flour and baking powder into a mixing bowl.
- Sift flour, icing sugar and custard powder together into a mixing bowl.