Yes. We think we should subpoena the CPD to produce his service records.

我们认为 应令芝加哥供他工作记录。

Next I'll draw a line from P down to B, and then  from P down to C, and I claim that this triangle here is congruent to its reflection across that  perpendicular bisector, which will be CPD.

接来，我将画一条从 P 向 B，然后从 P 向 C 线， 我声称这里这个三角形与其在垂直平分线上反射全等，这就是 CPD。