a white paper的用法和样例：
- Each mourner wore a black armband and a white paper chrysanthemum.
- A white paper is due in the spring and legislation is planned by the summer.
- We had our first rehabilitation programme plan and policy statement in the form of a white paper in 1977.
- What he refers to is we pats “the youth” together the time, at that time my 15 years old, a white paper.
- We each took a few pigments, a white paper and a straw, ready, on the other teachers has spoken.