The next stage is red hepatization, and it happens between days 3 and 4.

下一个阶段是红色肝炎，于第3天和第4天之间发生。

The third stage is gray hepatization, which happens around days 5 to 7.

第三阶段是灰色肝样变期，发生在第5-7天。

The name hepatization refers to the lungs taking on a liver-like appears from the reddish brown color of the exudate.

肝样变的名字是指红棕色渗出物使肺像肝一样。