他小时候摔伤膝盖留下的疤痕现在依然可见。

The ___scar from his childhood knee injury is still visible now.

童年的创伤在她心里留下了永久的伤痕。

The childhood trauma left permanent ___scars in her heart.

那次事故在墙上留下了一道明显的疤痕。

The accident left a noticeable ___scar on the wall.