a.

1. 能满足需要（量）的，足够的[（+for）][+to-v]
   Martin decided that he had no adequate proof.

   马丁断定他没有充足的证据。

2. 适当的[（+to/for）]
   He sought for an adequate solution to the problem.

   他寻求解决这个问题的适当办法。

3. 胜任的[F][（+to）]
   She proved adequate to the job.

   事实证明她能胜任此项工作。

4. 尚可的，差强人意的
   That hotel is merely adequate.

   那家旅馆只能说是差强人意。

adj.