a character witness.

• 见证人

a character witness.的用法和样例：

例句

1. I was a witness to the argument.
   我是那场争论的见证人。
2. His muddled evidence casts doubt on his reliability as a witness.
   他的证词糊里糊涂，使人对他作为见证人的可靠性产生了怀疑。